DOAC Health Guest Index
A living research index of health-related guests who have appeared on The Diary of a CEO. This is a discovery map, not medical advice or an endorsement of every claim made on the podcast.
Status: foundation pass · Updated: 26 Sep 2026
Scope: medicine, nutrition, metabolism, gut health, sleep, neuroscience, longevity, exercise, mental health/psychology, women's/men's health, environmental health.
How to use this index
Each guest is tagged by domain, background, and a simple evidence lens:
- Clinical / academic — established clinical or university/research role.
- Research communicator — relevant scientific training/research communication; may not be a practising clinician.
- Mixed / investigate claims — useful ideas, but individual claims should be checked against primary literature and clinical guidance.
- Psychology / mental health — included when the work is clinically or health relevant rather than general motivation.
The evidence lens describes the kind of source, not whether everything a person says is correct.
Master guest list
| Guest | Primary domain | Background / why here | Evidence lens | Research next |
|---|---|---|---|---|
| Andrew Huberman | Neuroscience, sleep, hormones, behaviour | Neuroscientist / academic researcher | Academic + communicator | Verify specific protocols individually |
| Peter Attia | Longevity, metabolic & cardiovascular health | Physician focused on longevity/healthspan | Clinical + communicator | Exercise, ApoB, metabolic claims |
| Matthew Walker | Sleep | Neuroscientist and sleep researcher | Academic | Sleep duration, caffeine, disease-risk claims |
| Tim Spector | Gut microbiome, nutrition | Physician, professor of genetic epidemiology, ZOE co-founder | Clinical + academic | Microbiome, fermented foods, UPF |
| Robert Lustig | Metabolism, endocrinology, sugar | Paediatric endocrinologist / professor | Clinical + academic | Fructose, insulin resistance, UPF |
| Chris van Tulleken | Ultra-processed food, obesity | Infectious-diseases physician / researcher & presenter | Clinical + academic | NOVA/UPF evidence |
| Rangan Chatterjee | Lifestyle medicine, stress | Physician / GP | Clinical + communicator | Lifestyle interventions |
| William Li | Nutrition, disease biology | Physician / researcher / author | Clinical + communicator | Angiogenesis and food claims |
| Rhonda Patrick | Nutrition, micronutrients, longevity | Biomedical scientist / science communicator | Research communicator | Vitamin D, omega-3, sauna |
| David Sinclair | Aging / longevity | Genetics and aging researcher | Academic | Human vs animal longevity evidence |
| Will Bulsiewicz | Gastroenterology, microbiome | Gastroenterologist | Clinical | Fibre diversity, microbiome |
| Pradip Jamnadas | Cardiology, fasting, metabolic health | Cardiologist | Clinical + communicator | Fasting and insulin claims |
| Rena Malik | Urology, sexual & men's health | Board-certified urologist | Clinical | Testosterone, ED, sexual health |
| Vonda Wright | Musculoskeletal health, aging | Orthopaedic surgeon | Clinical | Menopause, muscle/bone health |
| Mark Hyman | Functional medicine, metabolism | Physician / functional-medicine advocate | Mixed / investigate claims | Separate consensus from functional-medicine claims |
| Gabor Maté | Addiction, trauma, mind-body health | Physician / author | Clinical background + investigate claims | Trauma-disease causality |
| Paul Conti | Psychiatry, trauma | Psychiatrist | Clinical | Trauma frameworks |
| Daniel Amen | Psychiatry, brain health | Psychiatrist / clinic founder | Mixed / investigate claims | SPECT imaging claims |
| Ramani Durvasula | Clinical psychology, narcissistic abuse | Clinical psychologist | Clinical psychology | Evidence around narcissism/abuse |
| Robert Waldinger | Psychiatry, relationships, healthy aging | Psychiatrist / longitudinal research | Clinical + academic | Harvard adult-development findings |
| Nicole LePera | Psychology / self-healing | Psychologist / author | Mixed / investigate claims | Distinguish clinical evidence from wellness framing |
| Shefali Tsabary | Clinical psychology, parenting | Clinical psychologist / author | Psychology | Parenting / family-health relevance |
| Yvonne Burkart | Toxicology, environmental exposure | Toxicologist / science communicator | Research communicator | Dose/exposure evidence |
| Zach Bush | Microbiome / environmental health | Physician / wellness entrepreneur | Mixed / investigate claims | High priority claim verification |
| Zoe Harcombe | Nutrition | Nutrition researcher / author | Mixed / investigate claims | Dietary-fat and guideline claims |
| Jessie Inchauspé | Glucose / nutrition | Biochemist / science communicator | Research communicator | Glucose-spike intervention evidence |
| Martin Picard | Mitochondria, stress, aging | Columbia mitochondrial psychobiology researcher | Academic | Mitochondria, stress, energy |
| David Unwin | Type 2 diabetes / low carbohydrate | UK GP | Clinical | Diabetes remission evidence |
Domains
Gut, microbiome & nutrition
Tim Spector · Will Bulsiewicz · Chris van Tulleken · Robert Lustig · Jessie Inchauspé · William Li · Zoe Harcombe · Mark Hyman · Zach Bush
Metabolic health & diabetes
Robert Lustig · Peter Attia · Pradip Jamnadas · David Unwin · Tim Spector · Jessie Inchauspé · Mark Hyman
Longevity & healthy aging
Peter Attia · David Sinclair · Rhonda Patrick · Vonda Wright · Martin Picard · Robert Waldinger
Brain, neuroscience & sleep
Andrew Huberman · Matthew Walker · Daniel Amen · Martin Picard
Mental health, trauma & psychology
Gabor Maté · Paul Conti · Ramani Durvasula · Robert Waldinger · Nicole LePera · Shefali Tsabary
Men's / sexual health
Rena Malik · Pradip Jamnadas · Peter Attia
Environmental health / toxicology
Yvonne Burkart · Zach Bush
Confirmed episode anchors from the first research pass
- Tim Spector — DOAC conversations include The Shocking New Truth About Weight Loss, Calories & Diets (2 Jan 2023), a later food-focused conversation, and a 2026 microbiome episode.
- Matthew Walker — The World's No.1 Sleep Expert (The 6 Sleep Hacks You NEED!) (9 Mar 2023).
- Chris van Tulleken — The Junk Food Doctor / ultra-processed food conversation (23 Oct 2023).
- Robert Lustig — glucose/sugar/metabolic-health conversation (16 May 2024), with another DOAC appearance in 2025.
- Gabor Maté — The Childhood Lie That's Ruining All Of Our Lives (7 Nov 2022) and another long-form conversation in Oct 2023.
Research backlog
This foundation list is deliberately not labelled “complete” yet. Next sweeps should:
- Crawl the full DOAC catalogue year by year and add every health-related guest.
- Record every full episode for repeat guests, not just “Moment” clips.
- Add episode date, title and direct source link.
- Verify professional credentials against institutional/professional sources.
- Add a claims ledger for useful but disputed/high-impact claims.
- Link primary papers, systematic reviews and clinical guidelines where a claim is worth keeping.
- Keep podcast claims separate from our own conclusions.
Suggested guest record schema
Name · domain · credentials · institution/role · DOAC episode(s) · date(s) · key topics · key claims · primary evidence · consensus/guideline comparison · disagreements/limitations · books/resources · research notes · status.
Research principle: podcast appearance is a discovery signal, not evidence. Follow interesting claims back to primary research, systematic reviews, professional guidance, and relevant clinical expertise.