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Tag: iatrogenic

  • Bariatric Surgery: Risks in the OR and Beyond | NutritionFacts.org

    The extent of risk from bariatric weight-loss surgery may depend on the skill of the surgeon.

    After sleeve gastrectomy and Roux-en-Y gastric bypass, the third most common bariatric procedure is a revision to fix a previous bariatric procedure, as you can see below and at 0:16 in my video The Complications of Bariatric Weight-Loss Surgery.

    Up to 25% of bariatric patients have to go back into the operating room for problems caused by their first bariatric surgery. Reoperations are even riskier, with up to 10 times the mortality rate, and there is “no guarantee of success.” Complications include leaks, fistulas, ulcers, strictures, erosions, obstructions, and severe acid reflux.

    The extent of risk may depend on the skill of the surgeon. In a study published in The New England Journal of Medicine, bariatric surgeons voluntarily submitted videos of themselves performing surgery to a panel of their peers for evaluation. Technical proficiency varied widely and was related to the rates of complications, hospital readmissions, reoperations, and death. Patients operated on by less competent surgeons suffered nearly three times the complications and five times the rate of death.

    “As with musicians or athletes, some surgeons may simply be more talented than others”—but practice may help make them perfect. Gastric bypass is such a complicated procedure that the learning curve may require 500 cases for a surgeon to master the procedure. Risk for complications appears to plateau after about 500 cases, with the lowest risk found among surgeons who had performed more than 600 bypasses. The odds of not making it out alive may be double under the knife of those who had performed less than 75 compared to more than 450, as seen below and at 1:47 in my video.

    So, if you do choose to undergo the operation, I’d recommend asking your surgeon how many procedures they’ve done, as well as choosing an accredited bariatric “Center of Excellence,” where surgical mortality appears to be two to three times lower than non-accredited institutions.

    It’s not always the surgeon’s fault, though. In a report entitled “The Dangers of Broccoli,” a surgeon described a case in which a woman went to an all-you-can-eat buffet three months after a gastric bypass operation. She chose really healthy foods—good for her!—but evidently forgot to chew. Her staples ruptured, and she ended up in the emergency room, then the operating room. They opened her up and found “full chunks of broccoli, whole lima beans, and other green leafy vegetables” inside her abdominal cavity. A cautionary tale to be sure, but perhaps one that’s less about chewing food better after surgery than about chewing better foods before surgery—to keep all your internal organs intact in the first place.

    Even if the surgical procedure goes perfectly, lifelong nutritional replacement and monitoring are required to avoid vitamin and mineral deficits. We’re talking about more than anemia, osteoporosis, or hair loss. Such deficits can cause full-blown cases of life-threatening deficiencies, such as beriberi, pellagra, kwashiorkor, and nerve damage that can manifest as vision loss years or even decades after surgery in the case of copper deficiency. Tragically, in reported cases of severe deficiency of a B vitamin called thiamine, nearly one in three patients progressed to permanent brain damage before the condition was caught.

    The malabsorption of nutrients is intentional for procedures like gastric bypass. By cutting out segments of the intestines, you can successfully impair the absorption of calories—at the expense of impairing the absorption of necessary nutrition. Even people who just undergo restrictive procedures like stomach stapling can be at risk for life-threatening nutrient deficiencies because of persistent vomiting. Vomiting is reported by up to 60% of patients after bariatric surgery due to “inappropriate eating behaviors.” (In other words, trying to eat normally.) The vomiting helps with weight loss, similar to the way a drug for alcoholics called Antabuse can be used to make them so violently ill after a drink that they eventually learn their lesson.

    “Dumping syndrome” can work the same way. A large percentage of gastric bypass patients can suffer from abdominal pain, diarrhea, nausea, bloating, fatigue, or palpitations after eating calorie-rich foods, as they bypass your stomach and dump straight into your intestines. As surgeons describe it, this is a feature, not a bug: “Dumping syndrome is an expected and desired part of the behavior modification caused by gastric bypass surgery; it can deter patients from consuming energy-dense food.

    Doctor’s Note

    This is the second in a four-part series on bariatric surgery. If you missed the first one, see The Mortality Rate of Bariatric Weight-Loss Surgery.

    Up next: Bariatric Surgery vs. Diet to Reverse Diabetes and How Sustainable Is the Weight Loss After Bariatric Surgery?.

    My book How Not to Diet is focused exclusively on sustainable weight loss. Check it out from your local library, or pick it up from wherever you get your books. (All proceeds from my books are donated to charity.)

    Michael Greger M.D. FACLM

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  • Med Students Must Stop Performing Pelvic Exams on Unconscious Women Without Their Consent  | NutritionFacts.org

    Please note: This blog contains descriptions of sexual assault.

    “Recent reports of medical students performing pelvic exams for training purposes on anesthetized women without their consent”—or their knowledge—“have produced a firestorm of controversy and calls for greater regulation.” However, that “burst of public outcry” was in the mid-1990s. California was the first state to make the practice illegal, but the “early gains quickly petered out.”

    As I discuss in my video Ending the Hidden Practice of Pelvic Exams on Unconscious Women Without Their Consent, “This practice, common since the late 1800s, was largely unchallenged until a 2003 study reported that 90 percent of medical students who completed obstetrics and gynecology (ob-gyn) rotations at four Philadelphia-area medical schools performed pelvic exams on anesthetized women for educational purposes.” (A subsequent study found the percentage to be lower than that in other areas of the country.) The bottom line? “Pelvic Exams Done on Anesthetized Women Without Consent: Still Happening.” How can this continue into 2025? Medical ethicists have called such practices “immoral and indefensible.” “At the end of the day, this is a practice that should come to an abrupt and immediate halt.” Some schools vowed they’d end the practice, but, unfortunately, these early victories quickly stalled. At the same time, a handful of schools revamped their policies, an equal number of hospitals and medical schools publicly dug in, defending the practice.

    The Association of Professors of Gynecology and Obstetrics wrote: “As medical educators, we must balance our obligation to develop the next generation of physicians with women’s freedom to decide from whom they receive treatment and what aspects of their care are performed by learners.” “Some especially blunt teaching faculty contend that ‘public’ patients”—those without health insurance—“owe it to the facility and society to participate since they receive free or subsidized care.” Regulations to curb this practice are said to be “placing inappropriate and unnecessary barriers in the way of medical students who need to learn fundamental medical skills” and therefore “should be resisted.” Unsurprisingly, medical students still perform pelvic exams on anesthetized women.

    Professional medical societies have given lip service to the concept of asking for explicit consent, but despite the recommendations, “evidence…suggests that the practice is alive and well.” And the “unauthorized use of women is not a localized phenomenon confined to a handful of errant medical schools,” a few bad med school apples, but an international problem.

    Even with the emergence of the #MeToo movement and even after Larry Nasser, the infamous USA gymnastics doctor, was sentenced to 40 to 175 years in prison for touching women’s genitalia without their consent, “there are still women who are being used as teaching subjects for these exams without their permission, without their consent.”

    A 2020 update from Yale’s Center for Bioethics was entitled: “A Pot Ignored Boils On: Sustained Calls for Explicit Consent of Intimate Medical Exams.” It reads, “Over the last 30 years, several parties—both within and external to medicine—have increasingly voiced opposition to these exams. Arguments from medical associations, legal scholars, ethicists, nurses, and some physicians have not compelled meaningful institutional change.” Yes, there is the lip service paid by medical associations recommending bans on pelvic exams without consent, but those statements are “advisory and incomplete. Associations simply do not have the capacity to compel systemic change, as evidenced by institutions’ inaction.” In response to the medical profession’s inability to police itself, many states have passed legislation to protect patients from this practice.

    But, of course, if you are anesthetized, how would you even know if medical students are lining up or not? “Teaching hospitals take patients who are in the worst position to know what’s occurring—they are unconscious—and use them in ways that leave no physical signs and are often undocumented in the patients’ medical records.” So, when the media loses interest, as it has decade after decade, “what incentive is there for teaching faculty or hospitals to voluntarily change?” Perhaps, “when physicians start being threatened with litigation, they’ll start obtaining informed consent.” As one commentator wrote, “Hospital administrators who allow medical students in their facilities to perform pelvic examinations on unconsenting anesthetized women ought to consult with their legal counsel concerning the definition of rape in their jurisdiction.”

    “The solution is simple: Just ask.” Ask women for permission. It’s their body, their choice. “But recent experience has shown that meaningful and complete hospital-by-hospital change is unlikely to come until a hospital or doctor pays a substantial award [in some lawsuit] for this error in ethical judgment. We believe that day is coming soon, lest that ignored pot finally boil over. 
     
    “Some defend it as harmless and say asking for consent would make it more likely that patients would say no, denying students a crucial part of their training.” When I first wrote about this practice more than 20 years ago in my book Heart Failure about my time in medical school, I talked about how I had gotten the same comments from my classmates: “A well-then-how-are-we-going-to-learn response. To even present such a question is to lose a bit of one’s humanity. The answer, of course, is we should learn from women who give their consent! And to do that—God forbid—we might actually have to first establish a relationship with the patient, a trust—talk to them even. We may have to treat them like human beings.”

    It’s unconscionable that medical students are legally allowed to practice pelvic exams on anesthetized women without their consent. Even if you live in one of the states where this practice is technically illegal, how do you know the law will be respected once you’re unconscious? Maybe medical students should wear bodycams.

    If you missed the related video, see Medical Students Practice Pelvic Exams on Anesthetized Women Without Their Consent

    Michael Greger M.D. FACLM

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  • “An Outrageous Assault”: Pelvic Exams by Med Students on Anesthetized Women  | NutritionFacts.org

    Please note: This blog contains descriptions of sexual assault.

    From Heart Failure, a book I wrote about my time at Tufts University School of Medicine: “I am all gloved up, fifth in line. At Tufts, medical students—particularly male students—practice pelvic exams on anesthetized women without their consent and without their knowledge. Women come in for surgery and, once they’re asleep, we all gather around; line forms to the left…We learn more than examination skills. Taking advantage of the woman’s vulnerability—as she lay naked on a table unconscious—we learn that patients are tools to exploit for our education.”

    Using female patients to teach pelvic exams without their consent or knowledge remains “a dirty little secret about medical schools.” It is an “age-old” practice that continues to this day in med schools around the world. It’s been referred to as “the ‘vending machine’ model of pelvic exams, in which medical students line up to take their turn…” “Only it’s not a vending machine; it’s a woman’s vagina.”

    It’s been called “an outrageous assault upon the dignity and autonomy of the patient…The practice shows a lack of respect for these patients as persons, revealing a moral insensitivity and a misuse of power.” Indeed, “it is yet another example of the way in which physicians abuse their power and have shown themselves unwilling to police themselves in matters of ethics, especially with regard to female patients.” Said a residency-program director at the Johns Hopkins University School of Medicine, “I don’t think any of us even think about it. It’s just so standard as to how you train medical students.”

    What happened when this practice came to light in New Zealand? The chair of the New Zealand Medical Association got on television and said: “‘Until recently it wasn’t an issue…I’m very sorry that women feel they’ve been assaulted and violated in this way. That was never our intention.’ He had no idea then, asked the [TV] presenter, that women might object? ‘All I can say is that there have been no objections…’ ‘Could the reason be,’ asked the interviewer logically, “that it’s very hard for an anesthetized woman to know what’s going on?’”

    The practice has been defended publicly by many medical schools and hospitals, contending “this touching is entirely appropriate and clearly falls well within the patient’s ‘implied consent’ to carry out the operation.” After all, “patients are aware they are entering a teaching hospital and therefore know that trainees will be actively participating in their care.” However, “researchers have found that many patients do not know when they have interacted with medical students, or even whether they are in a teaching hospital.” How can this be? “Deliberate lies and deception.”

    “A survey of medical students found that 100% of them had been introduced to patients as ‘doctor’ by members of the clinical team,” and, as they go through training, there is, as a journal article is titled, an “Erosion in Medical Students’ Attitudes About Telling Patients They Are Students.” “Additionally, as medical students complete their clinical years of training, their sense of responsibility to inform patients that they are students is found to decrease,” especially if there is an opportunity to perform an invasive procedure. That may be why medical students seem to develop a “don’t ask, don’t tell” policy when it comes to seeking consent for pelvic examinations on anesthetized patients. More than a third of 1,600 medical students surveyed across the country strongly disagreed with the statement “Hospitals should obtain explicit permission for student involvement in pelvic exams,” as seen below and at 4:03 of my video Medical Students Practice Pelvic Exams on Anesthetized Women Without Their Consent.

    After all, doctors “argue that performing a pelvic examination is no more intimate than placing one’s hands inside an abdomen during general surgery or attempting to intubate a patient” and assert that sticking your fingers in a woman’s vagina is “just as intimate” as an ophthalmologist looking into the back of your eye; any claim to the contrary is just “another attempt to justify the obsession with political correctness.” Said one medical school professor, “Personally, I would prefer to see a new generation of well-trained doctors…rather than a nation of women whose vaginas are protected from battery by medical students.”

    The national survey concluded: “Patients admitted to teaching hospitals do not, however, by the mere act of admission relinquish their rights as human beings to have ultimate control over their own body and to be involved in decisions concerning their health care.”

    Is it possible that women just don’t care? Studies show that up to 100% of women asked said they would want to know that vaginal exams were being performed by medical students. Since patients care deeply about being asked, why can’t we at least ask their permission? “We can’t ask women,” the medical school faculty replied. “If we do, they might say no.”

    It’s jaw-dropping to me that I’m still trying to expose this practice more than 20 years after I first wrote about it. What’s to be done? Ending the Hidden Practice of Pelvic Exams on Unconscious Women Without Their Consent

    Michael Greger M.D. FACLM

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  • The Safety of Fasting to Lose Weight  | NutritionFacts.org

    The Safety of Fasting to Lose Weight  | NutritionFacts.org

    Why should fasts lasting longer than 24 hours and particularly for three or more days only be done under the supervision of a health professional and preferably in a live-in clinic? 
     
    Fasting for a week or two can actually interfere with the loss of body fat, as shown at the start of my video Is Fasting for Weight Loss Safe?. But, eventually, after the third week of fasting, fat loss starts to overtake the loss of lean body mass in obese individuals, as seen in the graph below and at 0:14 in my video. Is it safe to go that long without food? 

    Proponents speak of fasting as a cleansing process, but some of what is being purged from our bodies are essential vitamins and minerals. People who are heavy enough can fast up to 382 days without calories, but no one can go even a fraction of that long without vitamins. Scurvy, for example, can be diagnosed within as few as four weeks without any vitamin C. Beriberi, deficiency of thiamine (vitamin B1), may start even earlier in fasting patients. And, once it manifests, it can result in brain damage within days, which can eventually become irreversible.  
     
    Even though fasting patients report problems such as nausea and indigestion after taking supplements, all of the months-long fasting cases I’ve discussed previously were given daily multivitamins and mineral supplementation as necessary. Without supplementation, hunger strikers and those undergoing prolonged fasts for therapeutic or religious purposes (like the Baptist pastor hoping “to enhance his spiritual powers for exorcism”) have ended up paralyzed, become comatose, or worse. 
     
    Nutrient deficiencies aren’t the only risk. After reading about all of the successful reports of massive weight loss from prolonged fasting in the medical literature, one doctor decided to give it a try with his patients. Of the first dozen he tried it on, two died. In retrospect, the two patients who died had started out with heart failure and had been on diuretics. Fasting itself produces pronounced diuresis, meaning loss of water and electrolytes through the urine, so it was the combination of fasting on top of the water pills that likely depleted their potassium and triggered their fatal heart rhythms. The doctor went out of his way to point out that both of the people who died started out “in severe heart failure, complicated by gross obesity; but both had improved greatly whilst undergoing starvation therapy.” That seems like a small consolation since they were both dead within a matter of weeks. 
     
    Not all therapeutic fasting fatalities were complicated by concurrent medication use, though. One researcher writes: “At first he did very well and experienced the usual euphoria…His pulse, blood pressure, and electrolytes remained satisfactory, but in the middle of the third week of treatment, he suddenly collapsed and died. This line of treatment is certainly tempting because it does produce weight loss and the patient feels so much better, but the report of case-fatalities”—the whole part about killing people—“must make it a very suspect line of management.” 
     
    Contrary to the popular notion that the heart muscle is specially spared during fasting, the heart appears to experience similar muscle wasting. This was “described in the victims of the Warsaw ghetto” during World War II in a remarkable series of detailed studies carried out by the ghetto physicians before they themselves succumbed. In a case entitled “Gross Fragmentation of Cardiac Fiber After Therapeutic Starvation for Obesity,” a 20-year-old woman successfully “achieved her ideal weight” after losing 128 pounds by fasting for 30 weeks. “After a breakfast of one egg,” she had a heart attack and died. On autopsy, as you can see below and at 3:44 in my video, the muscle fibers in her heart showed evidence of widespread disintegration. The pathologists suggested that fasting regimens “should no longer be recommended as a safe means of weight reduction.” 
    Breaking the fast appears to be the most dangerous part. After World War II, as many as one out of five starved Japanese prisoners of war tragically died following liberation. Now known as “refeeding syndrome,” multiorgan system failure can result from resuming a regular diet too quickly. This is because there are critical nutrients such as thiamine and phosphorus that are used to metabolize food. Therefore, in the critical refeeding window, if too much food is taken before these nutrients can be replenished, demand may exceed supply. Whatever residual stores you still carry can be driven down even further, with potentially fatal consequences. This is why rescue workers are taught to always give thiamine before food to victims who have been trapped or otherwise unable to eat. Thiamine is responsible for the yellow color of “banana bags,” a term you might have heard used in medical dramas to describe an IV fluid concoction often given to malnourished alcoholics to prevent a similar reaction. (You can see a photo of them below and at 4:53 in my video.) Anyone “with negligible food intake for more than five days” may be at risk of developing refeeding problems. 
    Medically-supervised fasting has gotten much safer now that there are proper refeeding protocols. We now know what warning signs to look for and who shouldn’t be fasting in the first place, such as those who have advanced liver or kidney failure, porphyria, uncontrolled hyperthyroidism, and pregnant and breastfeeding women. The most comprehensive safety analysis of medically supervised, water-only fasting was recently published by the TrueNorth Health Center in California. Out of 768 visits to its facility for fasts up to 41 days, were there any adverse events? There were 5,961 of them! Most of these were mild, known reactions to fasting, such as fatigue, nausea, insomnia, headache, dizziness, upset stomach, and back pain. Only two serious events were reported, and no fatalities. You can see the chart below and at 5:58 in my video
    Fasting periods lasting longer than 24 hr, and particularly those lasting 3 or more days, should be done under the supervision of a physician and preferably in a [live-in] clinic.” In other words, don’t try this at home! This is not just legalistic mumbo-jumbo. For example, normally, your kidneys dive into sodium conservation mode during fasting, but should that response break down, you could rapidly develop an electrolyte abnormality that may only manifest with non-specific symptoms, like fatigue or dizziness, which could easily be dismissed until it’s too late. 
     
    The risks of any therapy must be premised on the severity of the disease. The consequences of obesity are considered so serious that effective therapies could have “considerable acceptable toxicity.” For example, many consider major surgery for obesity to be a justifiable risk, but the keyword is effective. 
     
    Therapeutic fasting for obesity has largely been abandoned by the medical community not only because of its uncertain safety profile but its questionable short- and long-term efficacy. Remember, for a fast that only lasts a week or two, you might be able to lose as much body fat or even more on a low-calorie diet than a no-calorie diet. 
     
    Fasting for a week or two can actually interfere with the loss of body fat. For more background on this, see Is Fasting Beneficial for Weight Loss? and Benefits of Fasting for Weight Loss Put to the Test.
     
    If you’re wondering what the best way to lose weight is, I wrote a whole book about it! Check out How Not to Diet
     
    Interested in learning more about fasting? See related videos below. 

    Michael Greger M.D. FACLM

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  • Debunking the 3,500-Calorie-per-Pound Rule  | NutritionFacts.org

    Debunking the 3,500-Calorie-per-Pound Rule  | NutritionFacts.org

    How many fewer calories do you have to eat every day to lose one pound of body fat? 

    The first surgical attempt at body sculpting was in 1921 on a dancer “who wanted to improve the shape of her ankles and knees.” The surgeon apparently scraped away too much tissue and tied the stitches too tight, resulting in necrosis, amputation, and the first recorded malpractice suit in the history of plastic surgery. Liposuction is much safer today, killing only about 1 in 5,000 patients, mostly from unknown causes, such as throwing a clot into your lung or perforating your internal organs. You can see a “Cause of Death” chart below and at 0:37 in my video The 3,500 Calorie per Pound Rule Is Wrong

    Liposuction currently reigns as the most popular cosmetic surgery in the world, and its effects are indeed only cosmetic. A study published in the New England Journal of Medicine assessed obese women before and after having about 20 pounds of fat sucked out of their bodies, resulting in a nearly 20 percent drop in their total body fat. Normally, if you lose even just 5 to 10 percent of your body weight in fat, you get significant improvements in blood pressure, blood sugars, inflammation, cholesterol, and triglycerides. But liposuction sucks. None of those benefits materialized even after massive liposuction, which suggests that the problem is not subcutaneous fat, the fat under our skin. The metabolic insults of obesity arise from the visceral fat, the fat surrounding or even infiltrating our internal organs, like the fat marbling our muscles and liver. The way you lose that fat, the dangerous fat, is to take in fewer calories than you burn. 
     
    Anyone who’s seen The Biggest Loser television programs knows that with enough caloric restriction and exercise, hundreds of pounds can be lost. Similarly, there are cases in the medical literature of what some refer to as “super obesity.” In one case, a man lost a massive amount of weight “largely without professional help and without surgery” and kept it off for years. He dropped 374 pounds, losing about 20 pounds a month by cycling two hours a day and reducing his daily intake to 800 calories, which is down around what some prisoners got at concentration camps in World War II. 
     
    Perhaps “America’s most celebrated weight loss” seen on television was Oprah’s. She pulled out a wagon full of fat, representing the 67 pounds she had lost on a very-low-calorie diet. How many calories did she have to cut to achieve that weight loss within four months? If you consult with leading nutrition textbooks or refer to trusted authorities like the Mayo Clinic, you’ll learn the simple weight loss rule: 1 pound of fat equals 3,500 calories. Quoting from the Journal of the American Medical Association, “A total of 3500 calories equals 1 pound of body weight. This means if you decrease (or increase) your intake by 500 calories daily, you will lose (or gain) 1 pound per week. (500 calories per day × 7 days = 3500 calories.)” 
     
    It’s the simple weight-loss rule that is simply not true. 
     
    The 3,500-calorie rule can be traced back to a paper published in 1958. The author noted that since fatty tissue in the human body is 87 percent fat, a pound of body fat would have about 395 grams of pure fat. Multiplying that by nine calories per gram of fat gives you that “3,500 calories per pound” approximation. The fatal flaw that leads to “dramatically exaggerated” weight-loss predictions is that the 3,500-calorie rule fails to take into account the fact that changes in the Calories-In side of the energy-balance equation automatically lead to changes in the Calories-Out side—for example, metabolic adaption, the slowing of metabolic rate that accompanies weight loss. That’s one reason weight loss plateaus. 
     
    Imagine a sedentary, 30-year-old woman of average height who weighs 150 pounds. According to the 3,500-calorie rule, if she cuts 500 calories out of her daily diet, she’d lose a pound a week or 52 pounds a year. In three years, she would vanish. She’d go from 150 pounds to -6. Obviously, that doesn’t happen. Instead, as you can see in the graph below and at 4:33 in my video, in the first year, she’d likely lose 32 pounds, not 52. Then, after a total of three years, she’d probably stabilize at about 100 pounds. This is because it takes fewer calories to exist as a thin person.  


    Part of it is “simple mechanics”: More energy is required to move a heavier mass, in the same way a Hummer requires more fuel than a compact car. Think how much more effort it would take to just get up from a chair, walk across the room, or climb a few stairs if you were carrying a 50-pound backpack. Even when you’re at rest, sound asleep, there’s simply less of your body to maintain as you lose weight. Every pound of fat tissue lost may mean one less mile of blood vessels through which your body has to pump blood every minute. So, the basic upkeep and movement of thinner bodies take fewer calories. As you lose weight by eating less, you end up needing less. That’s what the 3,500-calorie rule doesn’t take into account. 
     
    Imagine it another way: A 200-pound man starts consuming 500 more calories a day, maybe by drinking a large soda or eating two donuts. According to the 3,500-calorie rule, in ten years, he’d weigh more than 700 pounds. That doesn’t happen because, the heavier he is, the more calories he burns just by existing. If you’re 100 pounds overweight, it’s as if there’s a skinny person inside you trying to walk around balancing 13 gallons of oil or lugging around a sack filled with 400 sticks of butter. As you can see in the graph below and at 6:13 in my video, it takes about two donuts’ worth of extra energy just to live at 250 pounds, so that’s where you’d plateau if you kept it up. Given a certain calorie excess or deficit, weight gain or weight loss is a curve that flattens out over time, rather than a straight line up or down. 


    Nevertheless, the 3,500-calorie rule continues to crop up, even in obesity journals. Public health researchers used it to calculate how many pounds children might lose every year if, for example, fast-food kids’ meals swapped in apple slices for french fries. You can see the “Counting Calories in Kids’ Meals” graphic below and at 6:39 in my video

    They figured that two meals a week could add up to about four pounds a year. The actual difference, National Restaurant Association–funded researchers were no doubt delighted to point out, would probably add less than half a pound—ten times less than the 3,500-calorie rule would predict, as you can see below and at 7:06 in my video. That original article was subsequently retracted

     
    The 3,500 Calorie per Pound Rule Is Wrong is the first of 14 videos that are part of my fasting series, about which I did two webinars. The videos are on NutritionFacts.org, or you can get them all now in a digital download at Intermittent Fasting. You may also be interested in my webinars on Fasting and Disease Reversal and Fasting and Cancer.

    Other videos in this series are included in related videos below. 
     
    Check out some other popular videos on weight loss.

    I also recently tackled the ketogenic diet.

    Michael Greger M.D. FACLM

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