
How Not to Diet: The Groundbreaking Science of Healthy, Permanent Weight Loss
At a glance
LuvemBooks Verdict
Best for
Readers with a genuine appetite for nutritional science who want to understand the evidence-based mechanisms behind weight regulation — calorie density, gut microbiome, chronobiology — rather than follow a prescriptive short-term diet plan.
Worth it if
You're willing to engage with 608 pages of rigorously sourced research and are open to a plant-forward dietary framework as the foundation for long-term, sustainable weight management.
Skip if
You're looking for a concise quick-start programme, are firmly uninterested in plant-based eating, or prefer motivational personal-transformation narratives over evidence-and-mechanism-driven guidance.
What readers & critics say
The Telegraph, as quoted via Google Books, praised the book for delivering "the facts, not your typical fantasy, filler or fluff." Cornell University professor emeritus T. Colin Campbell, Ph.D., author of The China Study, is cited via Main Point Books as calling it "an encyclopedic tapestry of everything important and healthful for human nutrition," stating that no one has mastered the evidence base for a whole food plant-based diet like Dr. Greger.
“How Not to Diet is for those who want the facts, not your typical fantasy, filler or fluff.”
— The Telegraph (via Google Books)“There is no doubt that if you wish to learn how extensive is the evidence supporting a whole food plant-based diet, read this book. Dr. Greger has mastered that knowledge base like no one else.”
— T. Colin Campbell, Ph.D. (via Main Point Books)Look inside the book
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- Is it worth reading?
- For readers who want to understand the science behind weight loss rather than follow a rigid program, How Not to Diet is widely regarded as one of the more authoritative entries in the genre — backed by an instant New York Times bestseller designation and a strong endorsement from Dr. Dean Ornish, M.D., who called it 'one of the best books I've ever read on how to lose weight in sustainable ways that enhance health.' The book's strength is its research-forward architecture: Dr. Greger synthesizes primary research rather than popularizing a single study, and donates 100% of proceeds to charity, lending an independence rare in a field saturated with financial conflicts of interest. The key caveat is commitment — at 608 pages with a dense, mechanism-focused structure, it is demanding, and readers seeking a quick-start or motivational format are likely to find it overwhelming.
- Similar books
- Readers drawn to How Not to Diet will find natural companions among several titles curated alongside it. Dr. Greger's own How Not to Die Cookbook (also by Greger and Gene Stone) extends the plant-based framework into practical recipes. The China Study by T. Colin Campbell and Thomas M. Campbell is a foundational text making a research-based case for whole-food, plant-based eating. The Obesity Code by Jason Fung offers a contrasting science-based perspective on weight loss centered on insulin and fasting, while Outlive: The Science and Art of Longevity by Peter Attia, MD takes a broader evidence-driven approach to long-term health. In Defense of Food by Michael Pollan and Salt Sugar Fat by Michael Moss round out the picture with complementary investigations into food systems and nutrition science.
- Who should read this?
- How Not to Diet is best suited to adult readers who are genuinely curious about the science of weight regulation and willing to engage with a 608-page, research-dense text. It is particularly well-matched to those already open to — or interested in exploring — a plant-forward dietary approach, since the book's central framework is built around plant-based eating. Science-minded readers who want to understand the mechanisms behind nutritional recommendations, rather than simply follow a list of permitted foods, are the audience the book is designed for. Readers who prefer motivational narratives, personal-transformation stories, or a concise quick-start program are likely to find the book's evidence-and-mechanism orientation a friction point.
- About Michael Greger M.D. FACLM
- Michael Herschel Greger is an American physician, author, and speaker on public health issues best known for his advocacy of a whole-food, plant-based diet and his opposition to animal-derived food products.
- How does this compare to How Not to Die?
- Where How Not to Die focused broadly on the foods scientifically linked to preventing and reversing leading causes of disease, How Not to Diet narrows the lens to the science of obesity and sustainable weight loss specifically. Both books share Dr. Greger's hallmark methodology — synthesizing primary research rather than popularizing a single study — and both are built on a plant-centered dietary framework. How Not to Diet introduces new structural elements not present in the earlier book, most notably the twenty-one weight-loss accelerators and the incorporation of chronobiology as a variable in weight regulation.
- How science-heavy is it?
- How Not to Diet is explicitly research-forward: Dr. Greger's stated methodology involves synthesizing primary research rather than popularizing a single study or personal anecdote, consistent with his work at NutritionFacts.org. The book covers mechanisms such as calorie density, the insulin index, gut microbiome impact, and the emerging field of chronobiology, and is described by the publisher as 'chock full of actionable advice and groundbreaking dietary research.' The dual emphasis on scientific rigor alongside practical application is central to its design, though the balance tilts toward evidence and mechanism — readers seeking motivational narrative will find the tone clinical rather than inspirational.
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Age & Reading Level
Recommended age
Adult
Reading level
Adult
Skip if you want a concise quick-start diet plan, a motivational personal-transformation narrative, or a framework not centered on plant-based eating.
Editorial Review
How Not to Diet is a comprehensive, research-driven guide from internationally renowned physician and nutrition expert Dr. Michael Greger, published by Flatiron Books in December 2019. Building on the success of his New York Times bestselling How Not to Die, Dr. Greger turns his attention to the science of obesity and sustainable weight loss, covering key concepts such as calorie density, the insulin index, gut microbiome impact, and twenty-one evidence-based weight-loss accelerators — including findings from the emerging field of chronobiology. The book was an instant New York Times bestseller, and Dr. Dean Ornish, M.D., has called it one of the best books he has ever read on sustainable weight loss. Its plant-based framework and dense citation of current research make it an authoritative but demanding read, best suited to readers willing to engage seriously with nutritional science.
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