In Thriving in Midlife, Claudine Francois, a functional medicine and holistic health practitioner shares her story. This episode is centered around Claudine’s new book, ‘Your Midlife Body Code’, which aims to help midlife women decode their health symptoms and realign with their bodies to achieve lasting energy, clarity, and confidence. Claudine shares her personal health journey from being a CFO to becoming a functional health practitioner and the profound impact the FDN system had on her life and career.
Claudine discusses the frustrations many women face during midlife, such as unexplained weight gain, brain fog, and fatigue, despite living healthy lives. She emphasizes the importance of identifying and addressing root causes of these symptoms like mineral depletion, gut dysfunction, hormonal imbalances, and improper stress management. Claudine aims to provide structured and targeted advice through her book, enabling women to understand and support their bodies effectively without relying solely on generic health advice or traditional medicine.
Additionally, Claudine shares real client success stories, including one of an extreme athlete who regained her energy and mental clarity by following Claudine’s recommendations based on FDN principles. She stresses the significance of foundational health practices, such as proper nutrition, sleep, and stress release, before considering lab tests. The episode wraps up by encouraging listeners to visit Claudine’s website for more information or to purchase her book, ‘Your Midlife Body Code‘.
Join us as we celebrate the completion of the Functional Diagnostic Nutrition (FDN) course with one of our graduates. In this video, hear about her year-long journey, why she turned down naturopathic school, and how she discovered FDN through an unconventional way on Instagram. Learn about her health struggles, including endometriosis and PCOS, and how the FDN course helped her not only improve her own health but also provide better guidance to her clients. We discuss her background, her thoughts on the course structure, and her future aspirations including a move to Florida and involvement in a supplement business. Get insights into the importance of liver health, the benefits of a self-paced course, and the strong support system within the FDN community. Don’t miss out on this inspiring conversation about overcoming challenges, the value of continuous learning, and the importance of aligning with your true values.
00:00 Course Completion Excitement 00:25 Discovering the Course 01:56 Course Benefits and Personal Health 03:36 Educational Background and Career Path 08:41 Future Plans and Aspirations 11:53 Business Strategies and Pricing 16:18 Discussing Course Improvements 17:00 Importance of Course Updates 18:05 Completion Rates and Student Support 20:10 Highlighting the Liver’s Role 21:55 Building and Managing a Business 25:12 Future Plans and Opportunities 26:53 Concluding Remarks and Farewell
In this episode, Reed interviews Kailey, an accomplished IIN graduate who recently completed the FDN course. Kailey shares her journey, starting from her initial discovery of FDN through Instagram, to the detailed expectations she had for the course—particularly in the areas of lab testing and clinical correlation. She highlights how FDN exceeded her expectations and discusses the challenges and successes she experienced during the course. Kailey also talks about her shift from working in marketing to becoming a full-time health coach, the ways in which the FDN training has enhanced her practice, and her future plans. Notably, she explains how she utilized tools like Notion to improve her learning experience and manage client information effectively. Reed offers insights into the ongoing support and community within FDN and seeks Kailey’s advice on enhancing the course further.
00:00 Introduction and Congratulations 00:15 Discovering FDN 01:11 Course Expectations and Experiences 02:33 Transitioning to FDN 03:04 Impact on Career and Pricing 04:08 Marketing Job and Health Journey 05:31 Future Plans with FDN 08:24 FDN Community and Support 12:42 Tools for Success 19:59 Final Thoughts and Congratulations
Join Reed as he interviews Debbie, a newly minted FDN graduate, who shares her inspiring journey from a 20-year career as a nurse practitioner to discovering Functional Diagnostic Nutrition (FDN). Debbie talks about the challenges she faced, the unique aspects of the FDN course, and the skills and certifications that have transformed her professional and personal life. She also offers insights into how FDN filled gaps in her practice and discusses the potential for future collaborations and improvements within the FDN community. This episode is a deep dive into the value of FDN and its impact on healthcare practices.
00:00 Introduction and Congratulations 00:22 Discovering FDN: A Life-Changing Journey 01:29 Professional Background and FDN Impact 02:20 FDN Course Experience and Challenges 06:29 Future Aspirations with FDN 08:31 Pricing and Packaging Strategies 14:53 Course Feedback and Suggestions 22:05 Final Thoughts and Graduation
In this heartwarming interview, a nurse with a Doctorate in Nursing Practice shares her transformative experience with an FDN course. Highlighting her extensive career in pediatric healthcare, she discusses the practical application of the course in real life and how it connected various aspects of her knowledge. She emphasizes feeling reinvigorated and inspired to help others in new ways, moving from traditional healthcare towards functional health. The conversation covers her expectations, experiences, and future plans in functional health, along with her intent to balance her current job and new business venture. Tune in for an authentic and insightful discussion on transitioning careers, the value of continuous learning, and the potential of functional health practices.
00:00 Introduction and Course Completion 00:42 Discovering the Program 01:51 Educational Background and Career 02:22 Functional Health Journey 04:16 Expectations and Experiences 05:25 Future Plans and Business Vision 13:23 Feedback and Suggestions 18:32 Final Thoughts and Opportunities
Are you tired of Googling “best supplements for thyroid” or “top supplements for gut health” only to find conflicting advice that leaves your clients with mediocre results? You’re not alone. The supplement industry has created a prescription drug mentality that’s keeping even well-intentioned practitioners stuck in a symptom-chasing cycle that rarely delivers the transformative outcomes clients desperately need.
If you’ve ever wondered why your supplement protocols work sometimes but fail other times, or why your clients seem to plateau despite following “evidence-based” recommendations, this article will revolutionize how you think about supplementation. We’ll explore why the traditional approach falls short and introduce you to the “Test, Don’t Guess” methodology that’s helping over 5,000 Functional Diagnostic Nutrition (FDN) practitioners worldwide achieve consistent, life-changing results for their clients.
The Fatal Flaw in Modern Supplement Protocols
Most health practitioners, even in the functional medicine space, are still thinking like conventional doctors when it comes to supplements. They’ve simply replaced prescription drugs with “natural” alternatives, but the underlying philosophy remains the same: find a pill for the ill.
This approach treats supplements as “nature times 100” – more concentrated than food but less potent than pharmaceuticals. While this seems logical, it creates a fundamental problem: you’re still treating symptoms instead of addressing the root cause imbalances that create those symptoms in the first place.
When a client searches “best magnesium for sleep” or you recommend “adaptogenic herbs for adrenal fatigue,” you’re operating from the same symptom-focused mindset that keeps clients dependent on interventions rather than restoring their body’s natural ability to function optimally.
Why Clients Demand the “Magic Bullet” Approach
Your clients come to you expecting quick fixes because that’s what our healthcare system has trained them to expect. They don’t want to hear about lifestyle modifications, stress management, or comprehensive testing. They want you to tell them exactly which supplement will eliminate their brain fog, balance their hormones, or fix their digestion.
As practitioners, we often accommodate this expectation because we want to provide value and see our clients improve quickly. But this well-intentioned approach actually undermines long-term healing and creates the exact same dependency cycle that functional medicine was supposed to solve.
The FDN Revolution: Three Phases That Change Everything
Functional Diagnostic Nutrition has developed a different approach that honors both the client’s need for immediate relief and the practitioner’s commitment to lasting transformation. Instead of guessing which supplements might help, FDN practitioners use comprehensive lab testing to identify exactly where function has been lost, then support the body’s natural healing intelligence.
Phase 1: Relief Care (Intelligent Allopathy)
FDN practitioners do provide symptom relief, but we call it “intelligent allopathy” because it’s strategic, temporary, and always paired with deeper corrective work.
Relief care ensures clients can sleep, have regular bowel movements, and manage pain while the real healing work begins. This isn’t where we stop; it’s where we start. This phase builds trust and buys time for the more comprehensive protocol work ahead.
Examples of Relief Care:
Sleep support for the insomniac who hasn’t slept through the night in months
Digestive enzymes for the client with severe bloating after every meal
Anti-inflammatory support for someone in chronic pain
Phase 2: Corrective Care (The Real Work)
This is where FDN practitioners excel and where most other approaches fail. Instead of continuing symptom management indefinitely, we use comprehensive lab data to identify and correct the underlying imbalances creating symptoms.
The corrective phase addresses all five pillars of the DRESS protocol:
Diet: Personalized nutrition based on individual metabolic needs and lab findings
Rest: Optimizing sleep and recovery based on cortisol patterns and stress load
Exercise: Right-sizing movement based on adrenal function and energy reserves
Stress Reduction: Addressing physical, mental-emotional, and environmental stressors
Supplementation: Targeted nutrients to restore function in under-performing systems
The key difference: Instead of supplementing for symptoms, we supplement to restore measured imbalances in foundational body systems. If someone’s detoxification pathways are overwhelmed, we support those systems. If their immune system is overactive, we work to modulate that response. If their sex hormones are depleted because cortisol has been stealing their building blocks, we address the stress response first.
Phase 3: Maintenance Care (Substitution Strategy)
Once lab values normalize and symptoms resolve, clients transition to maintenance protocols that account for the realities of modern life. This isn’t about maintaining dependency on supplements, but recognizing that our current environment has some unavoidable gaps.
Modern soil depletion means food doesn’t contain the nutrient density it did 100 years ago. Environmental toxin exposure requires ongoing detoxification support that wasn’t necessary historically. Maintenance protocols substitute for these environmental deficiencies while allowing clients to reduce their overall supplement burden significantly.
Why Individual Lab Testing Changes Everything
Two clients come to you with identical symptoms: fatigue, weight gain, brain fog, and irritability. Traditional approaches would recommend similar supplement protocols, maybe some B vitamins, adaptogens, and omega-3s.
But what if Client A’s labs show depleted sex hormones, optimal cortisol, and excellent detoxification capacity, while Client B shows normal sex hormones, dysregulated cortisol patterns, and severely impaired liver function?
Client A might benefit from targeted hormone support and stress reduction techniques, while Client B needs adrenal support and detoxification protocols. The same symptoms, completely different root causes, requiring entirely different interventions.
This is why FDN practitioners run comprehensive foundational lab panels on every client, regardless of their presenting symptoms or health conditions. We test:
Cortisol and DHEA patterns to assess stress response and recovery capacity
Sex hormone production and metabolism to understand reproductive system function
Digestive markers to evaluate nutrient absorption and gut barrier integrity
Detoxification pathways to assess toxic load and elimination capacity
Immune system function to identify over- or under-activity
Real-World Case Example: When Partial Testing Fails
Consider Sarah, a 42-year-old client with severe irritability that’s affecting her marriage and work relationships. A hormone-focused practitioner might run a DUTCH test, see low progesterone and estrogen, and recommend bioidentical hormone replacement.
This approach might provide some improvement, but it misses crucial pieces of Sarah’s health puzzle:
What comprehensive testing revealed:
Severely impaired detoxification pathways causing toxic buildup in tissues
Overactive immune system creating systemic inflammation
Gut dysbiosis preventing proper nutrient absorption
Sarah’s irritability wasn’t just a hormone issue. It was the result of multiple system imbalances that hormone replacement alone couldn’t address. By supporting her detoxification capacity, modulating her immune response, and healing her gut, her hormones began to balance naturally, and her irritability resolved completely.
This is the power of comprehensive testing and systems-based supplementation.
The Bio-Individuality Factor Most Practitioners Miss
Even when practitioners move beyond symptom-based supplementing, they often miss the crucial element of bio-individuality. Not every client tolerates magnesium glycinate the same way. Not every person with “adrenal fatigue” responds well to the same adaptogenic herbs.
FDN practitioners introduce supplements one at a time, monitoring client responses carefully, and adjusting dosing, timing, or formulations based on individual tolerance and results. We never assume that what works for one client will work for another, even with identical lab findings.
This attention to individual response prevents the common scenario where clients suffer through supplement side effects because they think they’re supposed to “push through” negative reactions, a mindset that unfortunately carries over from conventional medicine’s approach to medication side effects.
Moving Beyond the Supplement-Centric Mindset
The biggest mindset shift for practitioners transitioning to this approach is understanding that the body’s healing intelligence is far superior to any practitioner’s clinical knowledge. Our job isn’t to force specific outcomes through targeted supplementation, but to remove obstacles and provide resources so the body can restore balance naturally.
When we supplement based on measured imbalances rather than symptoms or conditions, we’re essentially giving the body more “money” to spend on healing priorities. The body then allocates these resources exactly where they’re needed most, which is often different from where we think they should go.
This requires practitioners to trust the process and resist the urge to micromanage every symptom with a specific supplement.
The Questions That Transform Your Practice
Instead of asking “What’s the best supplement for sleep?” or “What’s the best protocol for Hashimoto’s?”, FDN practitioners ask:
What do this client’s labs reveal about their individual pattern of metabolic chaos?
Which foundational systems are under-functioning and need support?
Which systems are over-functioning and need modulation?
How can I restore balance to this unique individual’s physiology?
What obstacles are preventing this person’s body from healing itself?
This shift from condition-focused to individual-focused supplementation is what allows FDN practitioners to achieve consistent results across diverse client populations and health challenges.
Why FDN Practitioners Don’t Treat Conditions
In the FDN methodology, we don’t treat anything specifically. We would never go to the model of “this person has Hashimoto’s, so I’m going to figure out what the best supplements for Hashimoto’s are” because this person’s Hashimoto’s might be caused by an immune system imbalance, thyroid resource depletion, or any number of other root cause factors.
Instead of trying to guess why this person has Hashimoto’s, we look at the labs, see where function has been lost, and recommend supplementation accordingly. By addressing these underlying stressors, we give the body the resources it needs to restore balance, and often the Hashimoto’s symptoms naturally resolve as normal function returns.
Building Confidence Through Data, Not Guesswork
Many practitioners lack confidence in their supplement recommendations because they’re essentially guessing based on symptoms and hoping for the best. When you have comprehensive lab data showing exactly where imbalances exist, supplement selection becomes straightforward and logical.
You’re no longer wondering why some clients improve while others don’t. You’re not second-guessing your protocols or constantly changing approaches based on the latest research or trends. You have objective data guiding your decisions, which creates confidence in both you and your clients.
The Business Impact of Getting Supplementation Right
Practitioners using this approach report several business benefits:
Higher client retention because results are more predictable and sustainable
More referrals because clients experience genuine transformation rather than symptom management
Premium pricing justified by comprehensive testing and individualized protocols
Professional confidence that comes from using data rather than guesswork
Reduced liability from evidence-based rather than experimental approaches
When clients achieve lasting results, they become your biggest advocates, creating the kind of referral-based practice that provides true professional and financial freedom.
The One Change That Would Transform Every Practice
If there’s one thing that could transform every practitioner’s supplement approach overnight, it would be this: stop asking “What’s the best supplement for X condition?” and start asking “What’s the best supplement for this individual client?”
The questions practitioners should be asking are:
What is this client’s unique health history?
What challenges do they face in their daily life?
What do their comprehensive lab results reveal?
What obstacles do they need to overcome?
What is their specific pattern of metabolic chaos?
This shift from condition-based to individual-based supplementation is the foundation of successful functional health practice.
Your Next Steps: From Symptom-Chasing to Root-Cause Resolution
If you’re ready to move beyond the “best supplements for X condition” mindset and start delivering the kind of transformative results your clients are paying for, start with these steps:
Stop supplementing for symptoms and start investigating underlying causes
Implement comprehensive lab testing to identify individual patterns of dysfunction
Learn proper lab interpretation to understand what the data is really telling you
Develop systems-based protocols that address root causes rather than isolated symptoms
Monitor and adjust based on individual client responses rather than generic protocols
Transform Your Practice with Functional Lab Training
The supplement approach we’ve outlined in this article is just one component of comprehensive functional health training. FDN practitioners learn to interpret 70+ different functional lab tests, create personalized protocols using the DRESS framework, and build thriving practices based on consistent client results through our Medical Director Program (MDP), which provides lab access even for unlicensed practitioners.
If you’re ready to stop guessing and start getting reliable results for every client, regardless of their health challenges, our next free training workshop will show you exactly how successful practitioners are using functional lab testing to transform their practices and their clients’ lives.
The days of symptom-chasing and hoping your protocols work are over. It’s time to embrace the “Test, Don’t Guess” methodology that’s revolutionizing functional health practice worldwide.
Ready to learn the functional lab interpretation skills that will transform your practice? Join our free workshop to discover how to identify the root causes behind your clients’ symptoms and create personalized protocols that deliver consistent, lasting results. Register for your free spot and start building the confidence and expertise that sets true health professionals apart.
In this comprehensive interview, we spoke with Reed Davis, founder of Functional Diagnostic Nutrition® (FDN) and an experienced health professional who brings a unique perspective to the health coaching landscape. Having personally obtained NBHWC certification and developed the FDN training program, Davis breaks down the fundamental differences between these two pathways and helps aspiring health professionals understand which route might best align with their career goals.
Understanding NBHWC Certification: The Medical Model Approach
What Does NBHWC Stand For and Why Does It Exist?
The National Board for Health and Wellness Coaching (NBHWC) was established to create standards for health coaching within the healthcare system. According to Davis, “That organization, which I think is great, was founded around providing some standards for health coaching, primarily focused on medical assistance, helping provide physicians with some lifestyle coaching for their patients.”
The NBHWC certification exists primarily to integrate health coaches into traditional medical settings, where they can support physicians by helping patients with lifestyle modifications and treatment compliance.
Core Competencies of NBHWC-Certified Coaches
NBHWC-certified health and wellness coaches develop exceptional interpersonal and motivational skills. Davis, who went through an NBHWC-accredited program himself, notes: “The communication skills were excellent – active listening, figuring out why a person wants to get better, motivational approaches and techniques.”
Key skills include:
Active listening and relationship building
Motivational interviewing techniques
Behavior change coaching
Goal setting and accountability
Patient compliance support
However, there’s a significant limitation to this approach: “There was zero science other than maybe the science of personal motivation and psychology,” Davis explains. “No assessment skills on the health matter itself, only on the mental emotional matters.”
The Scope and Limitations of NBHWC Practice
NBHWC coaches operate within strict boundaries defined by the medical model. They work “on behalf of a doctor and their diagnosis” and cannot provide independent health assessments. Their role is primarily to help patients comply with medical treatment plans rather than investigate underlying health issues.
Davis points out a concerning trend: “The only study being done on health coaching by the National Institutes of Health is looking at how much a health coach contributes to medication compliance.” This highlights how the NBHWC model positions coaches as extensions of medical treatment rather than independent health investigators.
FDN Practitioner: The Investigative Approach to Functional Health
What Is Functional Diagnostic Nutrition®?
Functional Diagnostic Nutrition represents a fundamentally different approach to health coaching. “FDN training is designed to give the practitioner all of the skills and knowledge required to investigate the underlying causes of people’s health problems versus just management of disease or treatment of symptoms only,” Davis explains.
The FDN methodology emerged from Davis’s 10 years of clinical experience running thousands of functional lab tests on thousands of people, developing a systematic approach to uncovering root causes of health dysfunction.
The Science-Based Foundation
Unlike NBHWC programs, the FDN program is “totally based in science – anatomy, physiology, and biochemistry.” Students learn to:
Interpret functional lab tests including saliva, urine, blood, and stool analysis
Understand metabolic processes and how they affect health
Identify multiple causal factors contributing to health issues
Correlate lab findings with individual client presentations
Design personalized protocols based on scientific data
The D.R.E.S.S. Protocol: Individualized Health Solutions
FDN practitioners use the D.R.E.S.S. framework to create personalized health protocols:
Diet – Customized nutrition based on metabolic typing and lab results
Rest – Individualized sleep and recovery strategies
Stress reduction – Comprehensive stress management addressing mental, emotional, physical, and chemical stressors
Supplementation – Targeted nutritional support based on identified deficiencies and imbalances
“When you investigate and identify the causal factors, you’re not going to get the same results if you’re just going to throw supplements at a problem,” Davis emphasizes. “That’s why the lab work is so important – to individualize your protocols.”
Key Differences in Training Focus and Approach
Primary Goals: Compliance vs. Investigation
The fundamental difference lies in each program’s primary objective:
NBHWC Goal: Create standards that fit within the medical model, helping patients comply with doctor’s orders and treatment plans.
FDN Goal: Train practitioners to investigate underlying causes of health dysfunction and empower clients to address root causes through lifestyle modifications.
Science vs. Behavior Change Emphasis
NBHWC Programs: Heavy emphasis on behavior change techniques with minimal scientific health education. “Very little to none” science content, according to Davis.
FDN Program: Extensive scientific education in anatomy, physiology, and biochemistry, with behavior change skills integrated into protocol implementation and client support.
Tools and Methodologies
NBHWC coaches rely primarily on:
Motivational interviewing
Goal-setting frameworks
Accountability systems
Compliance tracking
FDN practitioners utilize:
Functional lab testing
Metabolic typing assessments
Scientific data interpretation
Personalized protocol development
Identifying causes of dysfunction
Quick Comparison: NBHWC vs. FDN at a Glance
Aspect
NBHWC Certification
FDN Practitioner
Primary Focus
Behavior change & compliance
Upstream causal factor investigation
Client Relationship
Client as expert, coach as guide
Practitioner as expert consultant
Scientific Training
Minimal
Extensive (anatomy, physiology, biochemistry)
Lab Testing
Not permitted
Core competency
Work Setting
Medical offices, hospitals, independent practice
Independent practice, integrative clinics, functional health practices
Client Protocols
Follow doctor’s orders
Design personalized protocols
Training Duration
Varies (typically 6-12 months)
6-10 months
Career Path
Employee in healthcare system, entrepreneur
Entrepreneur/independent practitioner, employee integrative medicine
Income Potential
Salary-based, $25-50 hourly rate as employee or contractor
Unlimited entrepreneurial potential, freelancer, independent contractor, salary based role
Practitioner-Client Relationship: Guide vs. Expert Consultant
The NBHWC Philosophy: Client as Expert
One of the fundamental philosophical differences between NBHWC and FDN approaches lies in the practitioner-client relationship dynamic. According to NBHWC principles, the client is considered the expert in their own life and health journey. NBHWC-certified coaches operate from the belief that clients possess the inherent wisdom and knowledge about what’s best for them.
In this model, health and wellness coaches serve as guides and facilitators who:
Help clients discover their own solutions
Use questioning techniques to draw out client insights
Support clients in finding their own motivation and commitment
Avoid providing direct advice or recommendations
Focus on the client’s self-discovered goals and action plans
This approach emphasizes client autonomy and self-directed change, with the coach acting as a supportive partner rather than an authoritative expert. The NBHWC coach’s role is to create a safe space for exploration and help clients tap into their own internal resources for healing and change.
The FDN Approach: Practitioner as Expert Consultant
In contrast, FDN practitioners position themselves as expert consultants whom clients specifically seek out for their specialized knowledge and expertise. Clients come to FDN practitioners precisely because they want professional insights, data-driven assessments, and expert recommendations they cannot access on their own.
FDN practitioners operate as knowledge experts who:
Provide specific recommendations based on lab findings
Interpret complex scientific data that clients cannot understand themselves
Design personalized protocols using specialized knowledge
Offer expert guidance on which interventions to implement
Take responsibility for the investigative and assessment process
“Clients seek us for our expertise to provide not only guidance but recommendations as well,” explains the FDN methodology. This approach recognizes that while clients are experts in their own experience and symptoms, they often lack the technical knowledge needed to understand the underlying biochemical and physiological factors contributing to their health challenges.
When Each Approach Works Best
The NBHWC Guide Model is most effective when:
Clients have straightforward lifestyle goals
The primary challenge is motivation and behavior change
Clients are working within established medical treatment plans
Simple habit formation and accountability are needed
Clients prefer to maintain full control over their health decisions
The FDN Expert Consultant Model excels when:
Clients have complex, chronic health issues
Multiple practitioners have been unable to provide answers
Scientific investigation and lab work are necessary
Clients specifically want expert recommendations and protocols
Data-driven solutions are preferred over trial-and-error approaches
The Impact on Client Outcomes
This philosophical difference significantly impacts the type of results each approach can achieve:
NBHWC outcomes typically focus on:
Improved adherence to existing treatment plans
Better lifestyle habits and behaviors
Enhanced motivation and goal achievement
Increased self-awareness and personal responsibility
FDN outcomes typically include:
Resolution of underlying health dysfunctions
Elimination of chronic symptoms
Personalized protocols that address root causes
Scientific understanding of individual health patterns
Choosing Based on Your Natural Approach
Consider your natural inclination when working with people who have health challenges:
Do you prefer to: Guide people to find their own answers, or provide expert recommendations based on scientific assessment?
Are you more comfortable: Facilitating client self-discovery, or taking responsibility for investigating and solving complex health puzzles?
Do you believe: Clients always know what’s best for them, or that specialized expertise is often necessary to uncover hidden health factors?
Your answers to these questions can help determine which approach aligns better with your personality, strengths, and professional vision.
These fundamental differences in training naturally lead to distinctly different approaches to the practitioner-client relationship itself.
Scope of Practice: What Each Can and Cannot Do
Lab Testing and Assessment Authority
Beyond these philosophical differences, one of the most significant practical differences is in diagnostic capabilities:
NBHWC coaches cannot order or interpret lab tests independently. They work within the confines of medical diagnoses and treatment plans provided by licensed physicians.
FDN practitioners can legally order and interpret functional lab tests. “Absolutely, we do it,” Davis confirms. “Anyone can run tests with the intention of finding out what’s really wrong for a person. That data is yours – whether you’re a health coach or the client.”
In 2008, Davis created one of the first direct-to-consumer lab testing programs, specifically enabling non-licensed practitioners to access functional testing for their clients.
Protocol Development and Implementation
NBHWC coaches implement protocols designed by medical professionals, focusing on adherence to prescribed treatments.
FDN practitioners design comprehensive, individualized protocols based on lab findings and scientific assessment, taking full responsibility for the investigative and recommendation process.
Ideal Client Profiles for Each Approach
NBHWC Coaching Clients
NBHWC coaches work best with clients who:
Are already working with medical professionals
Need support with lifestyle habit changes
Require accountability for medical treatment compliance
Benefit from motivational coaching within established treatment parameters
“Anyone that needs help with diet and exercise and habits – getting rid of poor habits and adopting new habits,” Davis notes. However, he cautions that this approach may miss underlying dysfunctions: “If you’re really dysfunctional, there’s a lot of causal factors that might be ignored.”
FDN Practitioner Clients
FDN practitioners excel with clients who:
Have complex, multi-system health issues
Have been through multiple practitioners without resolution
Want to understand the root causes of their symptoms
Are motivated to make significant lifestyle changes
Prefer data-driven approaches to health improvement
“The ideal FDN customer is someone who’s willing to change some things, who’s got a health problem – something about the way they look or feel – and is willing to change it and really wants to change it,” Davis explains. “Especially when nothing else has worked for you.”
Career Opportunities and Professional Pathways
NBHWC Career Trajectories
NBHWC-certified coaches typically find employment in:
Medical offices and clinics
Hospital wellness programs
Corporate wellness initiatives
Insurance-based health coaching programs
Telehealth platforms supporting medical care
These positions often involve working as part of a medical team, with structured protocols and oversight from licensed healthcare providers.
FDN Practitioner Career Paths
FDN practitioners have broader professional options:
Independent Practice: Many FDN graduates build successful solo practices, offering comprehensive functional health assessments and personalized protocols.
Collaborative Settings: Work alongside chiropractors, naturopaths, and other alternative practitioners in integrative clinics.
Corporate Opportunities: Progressive companies seeking advanced wellness programs hire FDN practitioners for their scientific expertise.
International Practice: The ability to work remotely with functional lab testing enables global practice opportunities.
Teaching and Mentoring: Experienced practitioners often expand into education and mentoring roles within the FDN community.
Income and Lifestyle Considerations
Davis emphasizes the financial and lifestyle benefits of FDN practice: “You got your freedom to work your own schedule, geographical freedom anywhere there’s an internet connection, emotional freedom from rewarding work, and financial freedom to afford a personal trainer and organic food and live where you like to live.”
The entrepreneurial nature of FDN practice allows practitioners to:
Set their own pricing structures
Choose their client base
Work from anywhere with internet access
Scale their practice according to personal goals
Maintain work-life balance through flexible scheduling
Combining Both Certifications: Is It Worth It?
The Strategic Advantage
Davis strongly recommends that NBHWC coaches consider adding FDN training: “If you’re an NBHWC, you should take the FDN program because now you’ll be cooking with gas. Not only will you have all the coaching skills and motivational skills and commitment skills and communication skills of an NBHWC, you’ll also have the ability to run the labs, find out what’s really wrong with the person.”
This combination provides:
Enhanced coaching skills from NBHWC training
Scientific assessment capabilities from FDN education
Broader career opportunities in both medical and independent settings
Increased client success rates through comprehensive approaches
The Reverse Combination
For those considering FDN first, Davis suggests the additional NBHWC certification may be unnecessary: “If you’re FDN, you probably don’t need the NBHWC course. There’s lots of ways to develop those coaching skills.”
FDN training includes practical coaching elements focused on protocol implementation and client support, which may be sufficient for many practitioners.
Decision-Making Framework: Choosing Your Path
Critical Questions to Ask Yourself
Davis poses the fundamental question every aspiring health professional should consider: “Do you want to be coaching your customers based on doctor’s orders, or based on the labs and investigation that you’ve done with a very high degree of accuracy and skill and knowledge?”
Additional considerations include:
Scientific Interest: “Am I willing to learn the anatomy, physiology, and biochemistry so that I truly understand what a person’s problems are?”
Practice Model Preference: Do you prefer working within established medical systems or developing independent protocols?
Client Population: Are you drawn to supporting medical compliance or investigating complex health mysteries?
Career Goals: Do you prioritize job security within medical systems or entrepreneurial freedom?
Learning Style: Do you prefer behavior-focused training or science-heavy education?
Making the Right Choice
The decision ultimately depends on your professional vision and personal strengths. Davis summarizes: “If you don’t want to learn anatomy, physiology, and biochemistry and you just want to help that patient follow doctor’s orders, then go the other way.”
For those drawn to investigation, problem-solving, and scientific assessment, FDN offers a pathway to become what Davis calls “that investigator” who can “find out what’s really wrong” and “teach them how to fix it.”
The Future of Functional Health Practice
Industry Evolution
Davis sees FDN as representing the future evolution of healthcare: “The final evolution is actually FDN – we’re what medicine is evolving into, to the benefit of the public.” This perspective positions FDN practitioners at the forefront of a healthcare transformation toward root-cause medicine and personalized protocols.
Meeting Growing Demand
As more people seek alternatives to symptom-focused medical care, the demand for practitioners who can identify underlying causes and provide personalized solutions continues to grow. FDN practitioners are uniquely positioned to meet this demand with their combination of scientific training and practical coaching skills.
Frequently Asked Questions
Can I practice functional health coaching without a medical license?
Yes, FDN practitioners can legally order and interpret functional lab tests without a medical license through direct-to-consumer lab programs specifically designed for non-licensed practitioners.
Which certification is better for working in hospitals?
NBHWC certification is generally preferred in traditional medical settings like hospitals, where coaches work under physician supervision to support treatment compliance.
How long does each program take to complete?
Both programs typically take 6-12 months to complete, though specific requirements and timelines may vary by institution.
Can I work internationally with these certifications?
FDN practitioners often have more flexibility for international practice due to their ability to work remotely with functional lab testing. NBHWC coaches may face more restrictions depending on local healthcare regulations.
What’s the income difference between the two paths?
NBHWC coaches typically work in salaried positions within healthcare systems, while FDN practitioners have unlimited income potential as entrepreneurs setting their own rates and building independent practices.
Key Takeaways: Making Your Decision
The choice between NBHWC certification and FDN training represents a fundamental decision about practice philosophy and career trajectory. Consider these final points:
Choose NBHWC if you:
Prefer working within established medical systems
Excel at motivational coaching and behavior change
Want the security of traditional employment
Are comfortable working under physician oversight
Choose FDN if you:
Are drawn to scientific investigation and identifying where the body has lost function
Want entrepreneurial freedom and unlimited income potential; or
Want to work in a functional medicine practice
Prefer designing personalized protocols based on data
Seek to work with complex, chronic health conditions
Consider both if you:
Want maximum career flexibility
Enjoy both coaching and scientific analysis
Plan to work in diverse healthcare settings
Seek to maximize your impact on client outcomes
Your Next Steps
Ready to advance your health coaching career? Here’s how to move forward:
Assess your interests: Take time to honestly evaluate whether you’re more drawn to behavior coaching or scientific investigation
Research programs: Compare specific NBHWC-approved programs and FDN training options
Connect with practitioners: Speak with professionals in both fields to understand day-to-day realities
Consider your goals: Align your choice with your long-term career and lifestyle objectives
As Davis concludes: “We invite anyone who’s interested in helping others and really wants to be able to get to the underlying causes and work at that level… they’ve got a place to go and a community to join and live the life that you want to live, walk your talk and be happy helping people.”
The choice is ultimately yours – but understanding these fundamental differences ensures you can make an informed decision that aligns with your vision for your health coaching career.
An inside look at FDN’s “Test, Don’t Guess” approach and why graduates are building six-figure practices
The functional health space is full of practitioners promising to “get to the root cause.” Yet clients often find themselves bouncing from one protocol to the next, spending thousands with little to show for it.
Reed Davis has a different story. After 10 years running “thousands of labs on thousands of people” in clinical practice, he noticed something: some clients got dramatically better while others didn’t. The pattern wasn’t random—it was methodical.
That observation became the foundation for Functional Diagnostic Nutrition® (FDN), which has now trained over 5,000 practitioners worldwide.
From Clinical Frustration to Clear Methodology
Davis’s original mission was straightforward: “My job when I first started was to find out why someone was ill versus just treating or managing their symptoms. In other words, what are the underlying causes and conditions so that they could heal themselves?”
Those 10 years of hands-on work revealed crucial patterns. “I ran thousands of labs on thousands of people, and with great mentorship, made my own observations about who got better and who didn’t, and developed a methodology from that.”
The breakthrough came when Davis realized the broader impact possible: “Finally after 10 years, I realized the greater impact that would occur if I could teach other practitioners the model, the methodology.”
His mission crystallized: “To educate people and practitioners how to get well and stay well so that they in turn may educate others.”
What “Test, Don’t Guess” Really Means
FDN’s signature phrase goes deeper than just running lab tests. Davis explains the problem with how most practitioners approach testing:
“A lot of people say, ‘well, I already test. Yeah, I run tests too.’ But they’re guessing which tests to run based on symptoms.”
This creates what he calls a “sounds like method.” If symptoms sound like thyroid issues, they run thyroid tests. If it sounds like digestive problems, they test the gut.
“So they’re using a sounds like method to determine which test to run. And so therefore, they’re not getting as comprehensive an assessment.”
The result? “They’ll think they found the problem and treat the paper and hope the person does better. But if the person appears with new complaints… they’ll run another test. So now you’re on a new cycle of test, treat the paper, test, treat the paper, test, treat the paper.”
FDN takes the opposite approach: “We insist on trying to identify multiple healing opportunities in the testing phase.” Instead of chasing symptoms, practitioners look for causal factors that might be “very far upstream, very far removed from where the symptoms occur.”
But running multiple tests isn’t enough. “You have to also observe how those causal factors are affecting each other, creating a state of multiple metabolic chaos. And so that’s more or less our job—to sort out metabolic chaos by looking for multiple causal factors and healing opportunities.”
How FDN Differs From Other Programs
When prospects compare FDN to popular programs, Davis draws clear distinctions:
“What we teach is how to get the data that will actually drive an individualized program versus a generic program.”
He breaks down the competition: “These programs teach general protocols. They have a hundred diets, and I’m not sure how they determine which diet for which person. And most of them are more of a coaching… active listening and motivational strategies and ways of getting people to do what their doctor’s telling them to do.”
“Neither one is even close to FDN in terms of running the labs, getting the data, and truly identifying the healing opportunities that an individual needs to know about.”
The focus on what Davis calls “bioindividuality and metabolic individuality” drives everything: “The FDN protocols have an effect on every cell, tissue, organ, and system simultaneously, so people simply are getting well.”
Built on Practical Experience, Not Theory
Davis emphasizes that FDN is “taught based on practicalities, based on methodology” rather than academic theory. The methodology “was developed over a 10-year period in an office observing who got better and who didn’t.”
“We’re teaching you practical, step-by-step methodology that does work, and it starts with yourself and working on yourself,” he explains. Students complete the program with personal experience using the protocols they’ll recommend to clients.
The structure reflects this hands-on approach: “It’s a self-paced course where you work on yourself as part of the learning process with lots of one-on-one mentorship.”
The Six-Figure Claim: Confidence Based on Results
Davis makes a bold statement about graduate earning potential: “We believe if you’re not earning 6-figures in your first 6-12 months, you’re doing something wrong.”
His confidence comes from repeated success stories: “I am very confident in it, because I’ve seen people do it over and over and over again, and I’ve personally done it.”
In fact, he suggests the potential is higher: “The six figures should be actually multiple six figures. So I can teach you how to make a hundred thousand dollars, which is six figures every three months.”
This earning potential reflects the value FDN practitioners provide through data-driven results. Davis teaches what he calls “a model of working part-time and doing multiple six figures in business… working from your own hours, working your own hours from anywhere that you have an internet connection.”
What Separates Successful Graduates from Struggling Ones
Not every graduate achieves the same results. Davis attributes the difference to mindset and approach:
“I think their personal point of view and self-worth and self-awareness and maturity and ability to handle… ability to face challenges and their ability to confront issues. And it’s all, for me, it’s all about self awareness and self development.”
Struggling practitioners often get “caught up in what they can’t do” instead of taking action. His advice is direct: “Just go out and apply the principles, go out and get a customer, help that customer, and learn from that and get another customer, and another customer, and another customer.”
He notes that struggling practitioners get hung up on structure and logistics instead of helping people: “People that get hung up on all of the structure, the legal entities and these kind of things… aren’t getting it. They’re really, you just need one customer to start doing some good in the world, and you’ll have some revenue from that.”
Building a Waiting List Practice
Successful FDN practitioners understand that a waiting list practice requires professional boundaries. Davis explains:
“A waiting list practice means you pace yourself and tell people that they have to wait and make an appointment. You create some exclusivity around your availability.”
Practically, this means never saying “call me anytime” because “if you say, call me anytime, it means you have nothing to do. You’re not busy and you’re not creating any kind of responsibility anywhere.”
Instead: “You say, my hours are Monday, Wednesday, and Thursday from one to five. How does next Wednesday at one sound to you? That creates some availability… that you’re a professional and that you have hours.”
The key is limiting appointments: “You’re only going to have nine appointments a week. Nine appointments a week, maybe 10, but anything over that, and you could get burnt out. And so you only want to have nine or 10 appointments per week. So those are exclusive and that’s your availability.”
Open Enrollment Philosophy
Despite the program’s $12,997 price point, Davis maintains an inclusive enrollment approach. When asked why FDN accepts almost anyone, he responds:
“Why would I turn anyone away? Is the better question. Why would I turn away a mother of three who just wants to learn to take care of herself and her kids? Why would I turn her away? The answer is there’s no good reason.”
Some students enroll “to learn the methodology for their own health and their families. And if that’s all they do with the education, work on themselves and their families, that’s worth the price of admission.”
But the ideal candidate is someone who “already has the clientele that they could tap into and uplevel their services, get better results, increase their reputation, and increase the revenue by adding these additional FDN services.”
The most successful? “The person who’s upleveling their skills can graduate and typically has more success than someone coming from a different background.”
Justifying the Investment
When prospects hesitate at the $12,997 cost, Davis puts it in perspective:
“It’s an investment that will have a return on investment, ROI, in a very short period of time. One can get their tuition back… with very few paying clients.”
He contrasts it with traditional education: “The only thing one could compare it to fairly would be a two to three year post-grad education. So a master’s or even PhD. We’ve had it compared to master’s programs that cost $60,000 and take a couple years out of your life.”
“I can teach you in 10 months what it took me 10 years to develop. And that’s remarkable. That is the bargain, if I’ve ever heard of one.”
What Graduates Discover
During postgraduate interviews, Davis consistently hears something that surprises him:
“They all seem pretty thankful that they could even learn it, like there’s nothing available to them anywhere, and they are just amazed that they didn’t have to go to college for six years or eight years.”
The revelation for many? “That there is a methodology, that there is a way that they too can help others. It really blows their minds, first of all that the labs are available and the interpretations that they’ve learned… that they can now go out and do it and help others.”
Many tell Davis that “FDN was the answer that they’d been searching for” and that it “ended that cycle of trial and error.”
Future Vision and Core Values
Looking ahead, Davis has ambitious but clear goals: “We’d like to see in the next three, five years, 25,000 FDN practitioners, certified and out in the world doing the good work.”
He’s equally clear about what FDN should never become. His biggest concern? Over-regulation: “I wouldn’t want it to become too regulated such as vocational institutional requirements. I want to keep it open to anyone that’s willing to learn and practice it on oneself or on others professionally.”
This reflects his broader philosophy: “We want to keep the handcuffs off of people.”
The Bottom Line
Davis sums up FDN: “FDN is a methodology and way of thinking that uses functional lab work—the data from functional lab work—to identify healing opportunities so people can deal with the true underlying causes and conditions, what’s really wrong, instead of just treating the symptoms or managing the symptoms.”
After more than a decade of training practitioners, Davis has built something specific: a methodology grounded in clinical experience that consistently produces results for both practitioners and clients.
What if the very hormone designed to help you survive is actually the reason you’re struggling to thrive?
My mother relentlessly saved and sacrificed so that she could enjoy her life in retirement. But two years into retirement, she was diagnosed with early onset Alzheimer’s.
Here’s what I’ve learned since becoming a Functional Diagnostic Nutrition Practitioner: she didn’t just “get” Alzheimer’s two years after retirement. It was building and building for years before that. She was making it worse with lifestyle choices: the over-exercising that women in their 40s and 50s often do, eating trans fats during the low-fat craze of the 80s and 90s.
Had I known what I know now, her outcome might have been different.
This is why I’m passionate about functional health. This is why thousands of practitioners are learning to identify and address the root causes of dysfunction before they become disease. If we can reach people in that gray space (when things are out of balance but before they become diagnosable conditions), we can change their trajectory. We can save lives.
As functional health practitioners, we see it every day: clients who’ve tried everything, followed every protocol, cleaned up their diet, and taken all the right supplements, yet they’re still stuck in that frustrating place of “I’m okay, but I’m not great.”
The missing piece? Understanding cortisol and its profound impact on every system in the body.
If you’ve ever wondered why some clients get amazing results while others plateau, or why you yourself might be experiencing symptoms that doctors dismiss as “normal aging,” this deep dive into cortisol will change everything.
What Is Wellness, Really?
Before we dive into cortisol, let’s get clear on what we’re actually working toward. At FDN, we don’t believe in “fine” or “okay.” We believe in abundant vitality.
Picture this as a spectrum:
The Right Side (The Medical Model): Symptoms → Sickness → Disease → Death
The Middle (Neutral Health): No symptoms, but no energy either. This is the “I’m fine, I guess” zone where most people live.
The Left Side (True Wellness): High energy, optimal function, metabolic fire, abundant vitality, joy for life.
Here’s the thing: neutral health equals a neutral life. When you’re operating from “I’m okay, I don’t have any complaints,” you’re not building empires, writing books, raising joyful kids, or showing up as your best self in relationships.
Good health, abundant vitality, is your birthright. It’s not just for the lucky few.
The Body’s Incredible Healing Power (And What’s Limiting It)
Your body is a self-healing machine. You know this because when you get a cut, it heals. When you break a bone, it mends. When you catch a cold, you recover.
But this healing ability isn’t infinite. If it were, we’d never age or die.
So what’s the difference between what your body can heal and what it can’t?
It’s a savings versus spending problem.
Think of your body as having a bank account called “Vital Reserve.” This is your innate intelligence: your body’s natural ability to function at 100% and fix imbalances before they become problems.
Where do you spend this precious currency? On your environment.
This has always been the case. Our paleolithic ancestors spent their Vital Reserve on not knowing if food would be available, dealing with harsh weather, avoiding predators, and navigating tribal conflicts.
Today? We spend it on mental-emotional stress, environmental toxins, and poor lifestyle habits that are constantly draining our account.
The main spender of Vital Reserve is stress.
The Modern Stress Problem: It’s Not What You Think
When most people think of stress, they picture this: work deadlines, traffic, relationship conflicts, financial pressure. And yes, these mental-emotional stressors are huge.
But there are two other categories most people completely miss:
Physical Stressors:
Sitting too long
Blue light exposure from screens
Too much coffee
Not exercising enough (or exercising too much)
Needing wine to fall asleep
Poor sleep quality
Environmental Stressors:
Depleted soils
EMF exposure
Chemicals in food, water, and air
Toxins our paleolithic ancestors never encountered
Plus, there’s the existential stress of modern life: What’s my purpose? How do I make my life meaningful when I’ll likely be forgotten in 100 years?
All of these are constantly withdrawing from your Vital Reserve account.
Meet Cortisol: Your Body’s “Energy on Credit” System
Cortisol is your primary stress hormone, and it’s actually designed to help you survive. When your environment throws stressors at you, cortisol says, “We need to put internal spending on hold and take all available resources to deal with this external threat.”
Cortisol breaks the body down for quick energy. We call this “catabolic.”
Why would your body have a mechanism for breaking itself down? Because sometimes you need energy RIGHT NOW. When your boss says, “This project is actually due in 30 minutes,” you can’t drive to the store, buy food, cook it, eat it, digest it, and then produce energy. You need quick fuel immediately.
So cortisol reaches for easy-to-break-down tissues like cartilage, tendons, connective tissue, and muscle, converting them to blood sugar.
Here’s the kicker: Cortisol is also a natural painkiller and anti-inflammatory. It masks the damage it’s doing, which is why it makes you feel amazing in the moment: clear thinking, quick reactions, pain-free movement.
Think of cortisol as your body’s credit card. You’re borrowing energy now and promising to pay it back later through rest, recovery, and healing.
When “Energy on Credit” Becomes a Problem
Throughout history, humans dealt with stress that was intense but occasional and short-lived. A wild animal attack, a natural disaster, a tribal conflict: these were serious but temporary.
Take a moment to think about this: Does this describe the stress in your life?
For most of us, stress is intense, constant, and never-ending. We wake up stressed, work stressed, drive home stressed, and lie in bed stressed about tomorrow’s stress.
This creates what we call “catabolic debt”: you’re constantly running up charges on your cortisol credit card without ever paying it back.
Chronic stress is not within our biological design.
Consider this: Anthropological studies show paleolithic humans worked only 15-20 hours per week. How many of you work only 15-20 hours per week? (And remember, “work” includes housework, childcare, and all the other responsibilities that don’t stop when you leave the office.)
They lived in close communities with cooperative resource sharing and had each other’s backs. Think about your own life: Do you know your neighbors? If you do, would they really have your back if things got serious?
Most of us are duplicating resources instead of sharing them. We’re all figuring out our own childcare, making our own meals, maintaining our own everything. There’s no interdependence, no shared load.
The cost of modern life is enormous:
70-80% of doctor visits are for stress-related illnesses
People with high anxiety are 4-5 times more likely to die from heart attack or stroke
Stress contributes to 50% of all illnesses
The Stress Response Curve: Your Roadmap to Understanding Where You Are
This is where it gets really interesting. Understanding this curve will change how you see your health (and your clients’ health) forever.
We all start in the green zone: Homeostasis. When you experience occasional stressors, cortisol and adrenaline spike, you handle the situation, then return to baseline to rest and repair.
But when stress becomes chronic, you move into the orange zone: Acute Stress. You’re constantly producing cortisol and adrenaline, never returning to homeostasis.
Here’s the thing: on your way up this curve, you feel AMAZING. Remember when you could pull all-nighters and still ace exams? When you could eat junk food without consequences? When you had laser focus for 12-16 hours straight?
That’s the acute phase. You’re running on cortisol, and it feels like superpowers.
Then you hit Peak Production. Your body says, “We’ve put way too much on the cortisol credit card. We have to cut back.”
Now you fall into the Compensatory Phase. Your cortisol numbers might look normal to a doctor, but the distribution is all wrong. Maybe you have too much in the morning and crash by afternoon, or you spike at night and can’t sleep.
Plus, you have a relativity problem. You’re used to feeling like Superman from the acute phase, so normal cortisol levels feel terrible by comparison.
Continue down this path, and you reach the Exhaustive Phase. Like a phone on low battery mode, everything still works but at 30% capacity and not for long. You’re devoting everything to just getting through the day.
The Hidden Cost: What Happens to Your Body’s Core Systems
At FDN, we focus on six foundational systems that chronic stress systematically shuts down. We call them the H-I-D-D-E-N systems, and understanding what happens to each one under chronic stress is crucial for practitioners:
H – Hormones DHEA is your anabolic hormone: the one responsible for building you back up after cortisol breaks you down. This is how you pay off your cortisol credit card. But when stress is constant, DHEA steps back and says, “I’ll come back when it’s safe to focus internally, but right now we need to keep spending on the environment.” DHEA becomes chronically low, which means your healing potential becomes chronically low.
Then sex hormones get the message: “We don’t have enough resources to fund fertility right now.” Sex hormones plummet, taking motivation and joy for life with them. This is when you get to that neutral state where you’re thinking, “I have dreams I want to pursue, but it’s just too much effort. I’ll just watch Netflix instead.”
I – Immune Your immune system is expensive to run. Under chronic stress, it says, “I cost a ton of money, so I’m going to operate at 30% capacity and not for very long.” Now you’re getting sick often, it takes forever to heal, you can’t shake that cough, and if anyone around you is sick, you know you’re going down.
D – Digestion Digestion costs a lot of energy to function properly. When you’re spending everything on stress, digestion goes into low-power mode. Now you’re only digesting at 30% capacity. Even if you’re eating the cleanest diet in the world, you can’t use it. You’re not getting the building blocks to repair or the nutrients your body needs to power metabolic functions at full capacity.
D – Detoxification Detoxification is another huge system that’s expensive to run. When your body’s bank account is overdrawn from cortisol debt, detox says, “I don’t have enough money to find these toxins, bind them up, and effectively remove them. So I’ll put them in storage instead.” Your body shoves toxins into fat cells, brain tissue, and bones, creating a toxic backlog that makes you feel slow, gives you acne, throws off digestion, and impairs hormone production.
E – Energy Production Your mitochondria can’t function optimally when all resources are diverted to stress response. This leads to that “tired but wired” feeling where you’re exhausted but can’t actually rest.
N – Nervous System Sleep, mood, and cognitive function all suffer. This is where we see the brain fog, insomnia, anxiety, and depression that so many people struggle with.
The fundamental principle of FDN: These systems don’t operate in isolation. You can’t just say, “Oh, you have classic hormone symptoms, so let’s run a hormone test.” You miss immunity, digestion, detoxification: all the other systems contributing to what we call “Metabolic Chaos.”
This is why the “take this supplement for that symptom” approach rarely works long-term. You’re not dealing with isolated problems: you’re dealing with systemic dysfunction where multiple systems are compromised simultaneously.
Real-Life Case Studies: The Stress Curve in Action
Let’s look at three real clients to see how this plays out. As FDN practitioners, we use what we call “clinical correlation,” which means we never look at lab numbers in isolation. We always consider how someone feels alongside their test results.
Case Study 1: Adam – The Acute Phase Crash
Profile: 35-year-old male, broker at a mid-size investment firm, former athlete still crushing CrossFit workouts
Symptoms: Weight gain, trouble concentrating, loss of muscle mass despite rigorous workouts, headaches
Doctor’s Assessment: “Your results are unremarkable. This is normal aging.”
Lab Results:
Cortisol sum: 9 (acute phase)
Four-point pattern: Way too high in morning, drops low at noon, crashes severely in afternoon, bounces back up at night
The Reality: How do we know Adam isn’t on the left side of the stress curve going up into acute phase? His symptoms tell us everything. If he were on the way up, he’d feel amazing and wouldn’t be in our office. Instead, he’s on the right side coming down from peak production.
His cortisol pattern explains everything: sky-high morning cortisol makes him feel wired and anxious, the afternoon crash leaves him unable to concentrate (not ideal for an investment broker), and the nighttime spike disrupts his sleep.
Even though his DHEA looks “normal,” when we compare it to his cortisol level of 9, he’s clearly catabolic dominant. He’s breaking down faster than he’s building up, which explains why his intense CrossFit sessions aren’t building muscle: they’re just adding more stress to an already overloaded system.
The Reality: Caitlyn’s cortisol sum looks normal, but the distribution is completely dysfunctional. She can barely drag herself out of bed in the morning, crashes hard in the afternoon (imagine trying to accurately record legal proceedings when your cortisol is plummeting), and lies awake at night because her cortisol spikes just when it should be lowest.
She also has a relativity problem. When she was in the acute phase, she felt like Superman. Now that she’s in compensatory with “normal” cortisol levels, she feels terrible by comparison. Her DHEA is low, confirming she’s still in catabolic debt despite the lower cortisol numbers.
Case Study 3: Maggie – The Exhaustive Phase Crisis
Profile: 43-year-old chef at a popular five-star restaurant, diagnosed with hypothyroid
Symptoms: Weight gain in hips and belly, trouble keeping up at work, depression, irregular menstrual cycle
Lifestyle: Working 60+ hours per week, consistently sleeping only 5 hours per night
Medical Status: Seeing a counselor, considering antidepressant medication
Lab Results:
Cortisol sum: 3.1 (exhaustive phase)
Four-point pattern: Way too low in morning, drops low at noon, slight bounce in afternoon, drops again at night
DHEA: Very low
Clinical correlation: Still catabolic dominant despite low cortisol
The Reality: Maggie’s body is operating like a phone on low battery mode: everything still works, but at 30% capacity and not for long. Her thyroid has downregulated because there’s literally not enough energy in the system to maintain normal function.
The depression isn’t just psychological: it’s physiological. Her body can’t afford to fund optimal brain function. Even though her cortisol is very low and her DHEA is very low, she’s still cortisol dominant and in catabolic debt.
This is why understanding the stress curve is so crucial. Three people, three different phases, three different approaches needed.
The Path Forward: Why Understanding Cortisol Changes Everything
Here’s why this matters for you as a health practitioner:
1. It explains why some clients plateau. If you’re not addressing the stress component, you’ll hit a ceiling on healing no matter how perfect the diet or supplement protocol.
2. It validates your clients’ experiences. When someone says, “I used to be able to handle so much more,” or “I don’t feel like myself anymore,” you now understand the physiology behind it.
3. It gives you a roadmap for intervention. Different phases require different approaches. Someone in the acute phase needs different support than someone in the exhaustive phase.
4. It highlights the importance of comprehensive testing. A single cortisol measurement tells you almost nothing. You need the full pattern plus clinical correlation.
The FDN Approach: Test, Don’t Guess
At FDN, we don’t just talk about stress: we measure it. We use what we call “clinical correlation,” which means we never look at lab numbers in isolation. We always consider how someone feels alongside their test results.
We look at:
Four-point cortisol patterns throughout the day (not just a single measurement)
DHEA levels and the cortisol-to-DHEA ratio
How stress is affecting all the H-I-D-D-E-N systems
The complete picture of metabolic chaos
Progress tracking with tools like the Metabolic Chaos Scorecard
Then we address it systematically through our DRESS protocol:
D – Diet: Personalized nutrition based on lab findings, not generic “healthy eating” advice
R – Rest: Sleep optimization and recovery strategies tailored to your stress phase
E – Exercise: Right-sized movement for your current capacity (over-exercise is just as harmful as under-exercise)
S – Stress Reduction: Targeted techniques for your specific stressors: mental/emotional, physical, environmental, and lifestyle factors
S – Supplementation: Targeted support based on actual lab results, not guesswork
This isn’t about generic protocols. It’s about understanding exactly where someone is on the stress curve and what their body needs to heal.
Key Takeaways for Health Practitioners
Cortisol isn’t the enemy. A lot of people talk about cortisol as if it’s the villain—commercials make it sound like cortisol just makes you “old and fat.” That’s not what cortisol does. Cortisol is a vital hormone for navigating stress. The problem is chronic stress disrupting its natural rhythm.
Understanding the stress curve is diagnostic gold. It explains why clients feel the way they do and gives you a framework for intervention. Different phases require different approaches.
Clinical correlation is everything. You can’t just look at lab numbers in isolation. A cortisol sum of 5 might be “normal” to a doctor, but if your client feels terrible and the distribution is dysregulated, that tells you the real story.
You can’t ignore stress and expect lasting results. No matter how perfect your diet protocol or how targeted your supplements, chronic stress will cap healing potential. There’s a ceiling you’ll never break through if you don’t address the stress component.
The body’s systems are interconnected. You can’t just “fix hormones” without addressing how stress is affecting immunity, digestion, detoxification, and all the other H-I-D-D-E-N systems. This is why comprehensive testing and systematic protocols are crucial.
Metabolic Chaos requires a systematic approach. When multiple systems are compromised simultaneously, you need a framework like DRESS that addresses all aspects of healing, not just isolated symptoms.
Your Next Steps
If you’re ready to master functional lab testing and learn how to identify and address cortisol dysregulation in your practice, FDN provides the training, community, and ongoing support you need.
Because here’s the truth: your clients deserve more than “fine.” They deserve abundant vitality. And you deserve the confidence that comes from knowing exactly how to help them achieve it.
When you understand cortisol (really understand it), you hold the key to unlocking transformation for every client who walks through your door.
Ready to become the practitioner who always knows what to do next?
The answer lies in data-driven functional health. The answer lies in understanding that robust health isn’t just about the absence of symptoms: it’s about the presence of vitality.
And it starts with the hormone you can’t ignore: cortisol.
Want to learn more about becoming a Functional Diagnostic Nutrition Practitioner?
Discover how our comprehensive training program gives you the tools to master cortisol testing, interpretation, and protocols that get results. Because when you know how to test, you never have to guess. View an indepth case study here.
