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Summary
I recently did a webinar on fibre with Dr Peter Brukner for the “Defeat Diabetes” organisation. I was asked 12 questions by Peter (before moving on to questions from the audience). This note contains a video of the webinar and a summary answer to each question. The questions were:
1) What is fibre?
2) We’ve been told for years – Denis Burkitt etc – that fibre is essential. Is there any evidence for that?
3) Fibre is supposed to prevent constipation, what’s the evidence for that?
4) We hear that grains, especially whole grains are an essential part of a healthy diet. Tell us about whole grains and fibre.
5) As low carb eaters, we get criticised for not getting enough fibre. What’s your response to that criticism?
6) What about fibre and its impact on blood sugar?
7) Can you have too much fibre?
8) If the evidence isn’t there for fibre, how come they are in all the dietary guidelines?
9) Surely these guidelines are supposed to be based on scientific evidence.
10) How do we reverse these guidelines? Surely this can’t continue.
11) Don’t we need fibre for the gut microbiome?
12) If you had 30 seconds to tell the public the truth about fibre, what would you say?
Introduction
On 25th June 2025, I did a webinar with Dr Peter Brukner for the organisation that he founded, which is called “Defeat Diabetes” (Ref 1). Defeat Diabetes is an evidence-based program, led by doctors and dietitians, to improve blood glucose levels and management. We chatted about this organisation and Peter’s work in Australia when Peter came on my podcast (published December 2024) (Ref 2).
There were a number of topics that we could have tackled but Peter suggested that fibre would be popular. You can see the hour’s webinar at the end of this note.
I was asked 12 questions. This note gives you a succinct answer to each one. (The webinar answer is longer in most cases). Answers may differ to those on the webinar – sometimes better thoughts come as I write.
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Zoe
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