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Jason Fung
Jason Fung (born 1973) is a Canadian nephrologist and low-carbohydrate diet advocate who promotes intermittent and extended fasting. He earned his medical degree from the University of Toronto and completed his residency and fellowship in nephrology. He has applied fasting protocols with more than 1,000 patients and co-authored The Complete Guide to Fasting with Jimmy Moore.
Biographical details sourced from Wikipedia.
On LuvemBooks, we've reviewed The Obesity Code.
1
Books ReviewedAsk LuvemBooks about Jason Fung
Jason Fung is a Canadian nephrologist who writes about metabolic health through the lens of clinical practice, arguing that hormonal dysfunction — particularly insulin resistance — is the root cause of obesity rather than simple calorie imbalance. His reviewed title, The Obesity Code: Unlocking the Secrets of Weight Loss, exemplifies his approach: using patient case studies and accessible breakdowns of endocrinology to challenge mainstream dietary advice. LuvemBooks has reviewed one of his books, which carries an Amazon reader rating of 4.6/5 across nearly 38,000 ratings.
- Where should I start?
- The Obesity Code: Unlocking the Secrets of Weight Loss is the natural starting point — it lays out Fung's core argument that insulin regulation, not calorie counting, is the key to sustainable weight loss, and it does so with enough clinical grounding to feel credible without requiring a medical background to follow. It has earned an Amazon reader rating of 4.6/5 from nearly 38,000 ratings, which suggests it resonates well beyond specialist audiences. Starting here will give you the framework Fung returns to across his broader body of work.
- What's their writing style?
- Fung writes in a direct, clinical-but-accessible voice that consistently pairs scientific evidence with patient-facing analogies, making endocrinology readable for a general audience without dumbing it down. He tends to structure his arguments polemically — identifying what he sees as the flawed consensus, presenting counter-evidence, and then building toward his own model — which gives his books a persuasive, almost prosecutorial momentum. He draws heavily on studies and historical dietary data, but anchors the material with real patient cases from his nephrology practice.
- Books we've reviewed
- LuvemBooks has reviewed one Jason Fung title to date: The Obesity Code: Unlocking the Secrets of Weight Loss, his flagship work laying out the hormonal theory of obesity and the case for low-carbohydrate and fasting-based interventions — it holds an Amazon reader rating of 4.6/5 from nearly 38,000 ratings.
- What genre do they write?
- Jason Fung writes narrative health and wellness non-fiction, specifically within the metabolic health and nutrition science sub-genre. His books are not diet books in the conventional prescriptive sense — they are closer to evidence-based arguments for rethinking how mainstream medicine understands obesity, diabetes, and disease, written for a general but intellectually curious readership. The Obesity Code sits comfortably alongside titles by authors like Gary Taubes or Tim Noakes for readers interested in contrarian, science-grounded challenges to dietary orthodoxy.
- What should I read after The Obesity Code?
- After The Obesity Code, Fung's own The Diabetes Code is the most natural next step — it applies the same insulin-resistance framework specifically to type 2 diabetes and extends the fasting recommendations in more clinical detail. For readers who want to go deeper on the fasting mechanics specifically, The Complete Guide to Fasting (co-authored with Jimmy Moore) is a practical companion that complements the theoretical grounding of The Obesity Code. Outside Fung's catalogue, Gary Taubes's Why We Get Fat covers similar intellectual territory from a journalism and historical-science angle.
Who is Jason Fung?
Where should I start?
What's their writing style?
Books we've reviewed
What genre do they write?
What should I read after The Obesity Code?
Who is Jason Fung?
Jason Fung (born 1973) is a Canadian nephrologist and intermittent fasting advocate who trained at the University of Toronto and has applied fasting-based treatment protocols with more than 1,000 patients. He is best known for arguing that obesity and type 2 diabetes are driven by hormonal imbalances — chiefly excess insulin — rather than a simple lack of willpower or caloric surplus. Beyond his clinical work, he co-authored The Complete Guide to Fasting with Jimmy Moore and has written on the metabolic roots of cancer. His books are frequently recommended in low-carbohydrate and fasting communities.
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