How Not to Diet: The Groundbreaking Science of Healthy, Permanent Weight Loss by Michael Greger cover

How Not to Diet: The Groundbreaking Science of Healthy, Permanent Weight Loss

by Michael Greger

$16.99 on AmazonRead our full review

At a glance

Pages608
First published2019
AudienceAdult
ISBN1250199220
Michael Greger

About the Author

Michael Greger

3 books reviewed

View author →

How Not to Diet

The Groundbreaking Science of Healthy, Permanent Weight Loss

by Michael Greger

LuvemBooks Verdict

Best for: Chronic dieters who have cycled through trending approaches without lasting results and want a rigorous, evidence-based explanation of why those approaches fail — and what the science actually supports instead.

Worth it? Skip it? Read the full verdict →

Look inside the book

Preview the actual pages, via Google Books

Ask LuvemBooks

Was this helpful?

How Not to Diet is a 608-page, peer-reviewed deep dive into the science of sustainable weight loss, authored by physician and NutritionFacts.org founder Michael Greger M.D. — a serious reference work that goes far beyond food rules to cover calorie density, the insulin index, gut microbiome health, chronobiology, and twenty-one evidence-based fat-burning accelerators. It debuted as an instant New York Times Best Seller and earned a notable endorsement from Dean Ornish, M.D., signaling genuine credibility within evidence-based medicine. LuvemBooks considers it essential reading for anyone who wants to understand the "why" behind weight management, with the key caveat that its plant-based framework and research-heavy depth make it a demanding fit for readers seeking a quick, protocol-driven guide.
Is it worth reading?
For readers who have cycled through trending diets without lasting success and want to understand the underlying science, LuvemBooks considers How Not to Diet a genuinely authoritative resource. Its scope is unusually wide — ranging across calorie density, hormonal response, microbiome science, circadian biology, and sleep research — and every topic is grounded in citations to research rather than anecdote. The book's comprehensiveness is also its main barrier: at 608 pages, it rewards the committed reader far more than the reader seeking a concise, step-by-step protocol. Those open to engaging with the depth of the science, and at least willing to consider a plant-based dietary framework, will find it a reference that rewards re-reading.
Similar books
Readers drawn to How Not to Diet will find natural companions in several works featured on this page. Greger's own How Not to Die (not currently in the LuvemBooks catalogue) established his evidence-based, plant-forward framework, while The How Not to Die Cookbook (Greger and Gene Stone) translates that philosophy into recipes. T. Colin Campbell and Thomas M. Campbell's The China Study is one of the most cited works underpinning the plant-based dietary case. For a different angle on weight and metabolism, Jason Fung's The Obesity Code focuses on insulin and intermittent fasting — a direct counterpoint to some of Greger's conclusions. Michael Pollan's In Defense of Food offers a more accessible, less research-dense argument for whole-food eating, and Peter Attia's Outlive covers longevity science with comparable scientific rigor from a different dietary perspective.
Who should read this?
How Not to Diet is best suited to adult readers who have grown frustrated with cycling through diet trends and want a rigorous, evidence-grounded explanation of why those approaches succeed or fail. It rewards those who want to understand the mechanisms behind weight management — calorie density, the insulin index, microbiome health, chronobiology — rather than simply follow a protocol. Readers who are open to a plant-based dietary orientation, or at least willing to engage with the evidence for it, will find the framework most directly applicable. It is less well suited to readers seeking a quick-start guide, a minimalist plan, or a framework compatible with ketogenic or other animal-product-centered diets.
About Michael Greger M.D. FACLM
Michael Herschel Greger is an American physician, author, and speaker on public health issues. He is best known for his advocacy of a whole-food, plant-based diet and his opposition to animal-derived food products.
Does the book push a plant-based agenda?
Greger is explicit that plant-based eating is not one option among many in his framework but a scientifically grounded foundation for sustainable weight management — so yes, the book's dietary direction is clearly plant-based. However, the review draws a distinction between advocacy and dogma: rather than prescribing a rigid meal plan, Greger identifies the criteria that make a diet effective, inviting readers to reason about food choices rather than follow rules blindly. The book also directly engages with and evaluates competing approaches — including ketogenic diets and intermittent fasting — rather than dismissing them without argument. Readers committed to animal-product-centered eating patterns should go in knowing the evidence is marshalled in a specific direction.
How does this compare to How Not to Die?
How Not to Die established Greger's evidence-based, plant-forward method and applied it broadly to preventing disease across multiple organ systems. How Not to Diet is a more focused successor, applying the same research-intensive approach to a single question: what does the evidence say about healthy, permanent weight loss. At 608 pages, How Not to Diet is arguably denser and more exhaustive in its treatment of that narrower topic, and it adds new territory — chronobiology, twenty-one weight-loss accelerators, detailed engagement with competing diet philosophies — that goes beyond what How Not to Die covered. Both books share the same authorial philosophy and citation-heavy style.
Summarize this book

Summarize this book

Published by Flatiron Books in December 2019, How Not to Diet is a science-focused nutrition reference book in which physician Michael Greger M.D. asks what peer-reviewed evidence actually says about healthy, permanent weight loss. The book moves through three broad sections: the root causes and mechanisms of obesity; a detailed framework for an ideal weight-loss diet built around calorie density, the insulin index, and gut microbiome health; and a final section that evaluates contested approaches including ketogenic diets, intermittent fasting, and high-intensity interval training. Greger also introduces twenty-one "weight-loss accelerators" — adjunct strategies drawn from fields including chronobiology — designed to work in concert with a solid dietary foundation, not as shortcuts around one. The publisher describes it as structured to be "timeless" and capable of standing up to any future diet trend.

Follow up

What are the 21 weight-loss accelerators?
Does it address keto and intermittent fasting?
How is the book structured?

Synthesized from verified book data & published reviews · How we review

Press Enter to ask. Answers come from our editorial Q&A — start typing to see related questions.

Age & Reading Level

Recommended age

Adult

Reading level

Adult

Skip if you want a concise, step-by-step weight-loss protocol rather than a deep engagement with nutritional science.

Editorial Review

A New York Times bestseller from the founder of NutritionFacts.org, How Not to Diet dismantles the diet-fad cycle by grounding weight loss in peer-reviewed nutritional science, making a research-dense case for plant-based eating, calorie density, gut microbiome health, and twenty-one evidence-based fat-burning accelerators — a serious, wide-ranging reference for readers willing to engage with the depth of the science.

Read the Full Review

Books like How Not to Diet

Curated picks for readers who enjoyed How Not to Diet, with our reasoning for each match.

If you liked How Not to Diet