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Casey Means

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Calley Means

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Reviewed

Read Time

9 min read

Age & reading levelAdult
Reader rating
4.6 · 5,511 Amazon ratings
reader ratings, not a LuvemBooks score
$15.20 on AmazonAudiobook
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Good Energy

Good Energy: The Surprising Connection Between Metabolism and Limitless Health by Casey Means MD & Calley Means Review: A Bold, Practical Metabolic Health Manifesto

by Casey Means, Calley Means

Good Energy, co-authored by Dr. Casey Means and Calley Means and published by Avery on May 14, 2024, is a #1 New York Times bestseller — with over a million copies sold — that advances a sweeping argument: that poor metabolic function is the common root cause underlying conditions as varied as depression, type 2 diabetes, Alzheimer's, cancer, and infertility. Part memoir, part manifesto, and part practical guide, the book pairs its central thesis with a four-week action plan, data drawn from the health technology company Dr. Means founded, and six food principles designed to be usable across dietary philosophies from carnivore to vegan.

$15.20 on Amazon
Adultsustained critique of the American healthcare system

LuvemBooks Verdict

Best for

Readers who feel let down by conventional medicine and want a single, evidence-referenced framework — plus a concrete four-week action plan — for understanding how metabolic health connects to chronic symptoms like fatigue, mood instability, hormonal disruption, and weight resistance.

Worth it if

You are open to the argument that cellular metabolism is a unifying root cause of modern chronic illness and want both the science behind that claim and practical, biomarker-tracked steps to act on it — regardless of whether you eat plant-based or animal-based.

Skip if

You come primarily for quick, system-neutral protocols and have little appetite for a sustained critique of American medicine as structurally complicit in metabolic disease — that argument is woven throughout, not confined to a chapter.

NPR's health desk covered the book substantively, highlighting Dr. Means's path from Stanford surgical training to metabolic health advocacy and her argument that mitochondrial dysfunction underpins a wide range of chronic conditions. Red Pen Reviews, a science-accuracy-focused book review site, notes the book argues that "nearly every health problem we face can be explained by how well the cells in our body create and use energy," encompassing both physical and mental health conditions — a scope it treats as the book's central and most contestable claim.

“A doctor lays out how to measure and boost your metabolic health — tracing her path from Stanford classrooms to a sweeping metabolic framework.”

— NPR
Sources: NPR, Red Pen Reviews
4.6from 5,511 Amazon ratings— reader ratings, not a LuvemBooks score

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Good Energy by Dr. Casey Means and Calley Means advances a bold, unifying thesis: that poor cellular metabolism is the common root cause behind a sweeping range of modern chronic conditions, from type 2 diabetes and Alzheimer's to anxiety and infertility. The book pairs its scientific argument with a concrete four-week action plan, six dietary principles designed to work across carnivore-to-vegan philosophies, and a sustained critique of the American medical system — making it essential reading for anyone who feels let down by conventional medicine and is ready to take an evidence-informed, self-directed approach to metabolic health. Readers seeking purely practical protocols without systemic critique, or those with clinical backgrounds who may find the single-root-cause framework more contested than the text acknowledges, should set their expectations accordingly.
Is it worth reading?
Good Energy has demonstrably resonated: it debuted as a #1 New York Times bestseller and has sold over a million copies since its May 2024 release, reflecting broad and sustained reader demand. Its most distinctive value is the combination of a unifying scientific framework with a genuinely actionable plan — Terry Wahls, MD, author of The Wahls Protocol, specifically notes that it shows readers how to get blood sugar and metabolic health under control as a foundation for better energy and health outcomes. The key caveat, particularly for readers with scientific or clinical backgrounds, is that linking conditions as neurologically, hormonally, and oncologically distinct as Alzheimer's, cancer, and erectile dysfunction to a single cellular mechanism is a bold claim that the text does not always acknowledge as contested. Readers who come primarily for practical protocols may also find the sustained systemic critique of American medicine more prominent than expected.
Similar books
Readers drawn to Good Energy's metabolic health framework and critique of conventional medicine will find natural companions in the curated titles below. Peter Attia MD's Outlive: The Science and Art of Longevity shares the data-driven, longevity-focused approach and similarly centers five key biomarkers of health risk. Jason Fung's The Obesity Code: Unlocking the Secrets of Weight Loss offers another physician-authored argument that mainstream dietary advice has misunderstood the hormonal and metabolic roots of chronic disease. For the systemic food-industry critique woven through Good Energy, Michael Moss's Salt Sugar Fat: How the Food Giants Hooked Us and Michael Pollan's In Defense of Food: An Eater's Manifesto provide compelling parallel reads. Gabor Maté M.D.'s When the Body Says No: Exploring the Stress-Disease Connection shares the book's interest in how modern conditions manifest in the body when its underlying systems are dysregulated.
Who should read this?
Good Energy is specifically designed for readers who feel that conventional medical advice has failed to resolve persistent, frustrating symptoms — fatigue, mood instability, weight resistance, and hormonal disruption — and who are open to a metabolic explanation for those experiences. Its dietary principles are structured to be accessible across philosophies from carnivore to vegan, so no particular eating style is a prerequisite. Readers with clinical or scientific backgrounds will find the central thesis stimulating but may want to engage it as a provocation rather than a settled consensus. Those who want purely practical protocols without systemic critique of the American medical system may find the book's advocacy framing more prominent than they expect.
About Casey Means MD, Calley Means
Paula Casey Means, known as Casey Means, is an American wellness influencer, author, and former physician. Good Energy is co-authored with her brother Calley Means.
What is 'good energy' vs 'bad energy'?
The authors use "good energy" to describe a state in which the body's cells create and use energy optimally, and "bad energy" to describe the breakdown of that cellular machinery. According to the book, "bad energy" signals — fatigue, mood disruption, metabolic syndrome — are not isolated symptoms but early warnings of potentially life-threatening disease. The framework positions cellular metabolism as the master system whose health or dysfunction cascades into conditions as varied as depression, type 2 diabetes, Alzheimer's, cancer, and infertility.
How does the book critique the medical system?
The book's critique of the American medical system is central rather than incidental — it argues that the system has systematically obscured the metabolic causes of chronic illness, prioritizing treatment over prevention and leaving patients without the diagnostic information they need. Robert Lustig, MD, describes it as telling "the story of a medical system run amuck," and the book includes a dedicated section on how to navigate the medical system to obtain the specific tests and metabolic information readers need. Readers who come to the book primarily for practical health protocols rather than systemic critique should be aware that this advocacy framing is woven throughout all 400 pages.
Summarize this book

Summarize this book

Good Energy, co-authored by Stanford-trained physician Dr. Casey Means and her brother Calley Means, argues that cellular metabolism — specifically how well the body's cells create and use energy — is the single unifying root cause behind the most prevalent chronic diseases of modern life, including type 2 diabetes, Alzheimer's, heart disease, anxiety, and infertility. The authors frame optimal cellular function as producing "good energy" and its breakdown as generating "bad energy" signals such as fatigue, mood disruption, and metabolic syndrome. The book blends cutting-edge research, data from the health technology company Dr. Means founded, and personal memoir — including her experience losing her mother to preventable metabolic disease — with a four-week action plan built around five predictive biomarkers. Robert Lustig, MD, emeritus professor of pediatrics at UCSF and author of Metabolical, describes it as "part memoir, part manifesto," calling Dr. Means's voice "cogent, urgent, and powerful."

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Good Energy, co-authored by Dr. Casey Means and Calley Means, arrives as a #1 New York Times bestseller with a sweeping proposition: that cellular metabolism is the unifying explanation for an enormous range of modern diseases.

What the Book Actually Argues

At the core of Good Energy is a single, ambitious claim — that nearly every major chronic illness plaguing contemporary life, from anxiety and infertility to heart disease, Alzheimer's, and type 2 diabetes, shares a common root in how well the body's cells create and use energy. Dr. Casey Means, a Stanford-trained physician, and her brother Calley Means frame this not as a lifestyle opinion but as a scientific framework: when cells are optimally powered, the body produces what the authors call "good energy," and when that cellular machinery falters, "bad energy" signals — fatigue, mood disruption, metabolic syndrome — become early warnings of potentially life-threatening disease.
The book weaves together cutting-edge research, personal stories, and data from the health technology company Dr. Means founded to build this case across its 400 pages.

The Book's Significance and Place in the Genre

Good Energy arrives at a moment of intense public interest in metabolic health, continuous glucose monitoring, and the limits of conventional medicine, and it moves beyond narrower predecessors by attempting to unify those conversations under one explanatory umbrella. Dr. Means's background as a surgical trainee, combined with her personal experience losing her mother to preventable metabolic disease, gives the book a dual register: rigorous enough to cite biomarker data and clinical research, yet shaped by grief and advocacy.
Robert Lustig, MD — emeritus professor of pediatrics at UCSF and author of Metabolical — describes it as "part memoir, part manifesto," calling Casey Means's voice "cogent, urgent, and powerful." That dual identity — scientific argument and personal reckoning — distinguishes it from purely clinical texts or purely popular wellness books.

Strengths: Scope, Structure, and Accessibility

One of the book's notable design choices is its four-week action plan, which translates the metabolic framework into concrete, trackable steps rather than leaving readers with theory alone. The plan is built around five biomarkers the authors identify as predictive of serious disease risk, and it incorporates inexpensive consumer tools and technology that allow individuals to monitor their own metabolic health — the authors describe this as the ability to "see inside your body" for the first time.
Beyond diagnostics, the book addresses sleep and circadian rhythm, a movement framework built around everyday activity rather than gym-centric exercise, and the role of cold and heat exposure in building resilience. It also includes a section on navigating the medical system to obtain the tests and information readers need.
Terry Wahls, MD, author of The Wahls Protocol, notes that the book shows readers specifically how to get blood sugar and metabolic health under control as a foundation for better energy and health outcomes.

The Critique: Breadth vs. Depth, and the Medical System Framing

The book's greatest strength — its sweeping scope — is also the source of its most legitimate tension. Linking conditions as neurologically, hormonally, and oncologically distinct as Alzheimer's, cancer, and erectile dysfunction to a single cellular mechanism is a bold claim, and readers with scientific or medical backgrounds may find the unifying argument more provocative than definitively settled.
Jillian Michaels, who endorses the book, acknowledges that the authors are "bold siblings on a mission" — a characterization that captures both the energy and the advocacy posture of the text. Additionally, the book's critique of the American medical system as one that has systematically obscured metabolic causes of illness is central rather than incidental to the argument; readers who come primarily for practical protocols rather than systemic critique may find that framing more prominent than expected.

Who This Book Is For

Good Energy is designed for readers who feel that conventional medical advice has not resolved persistent, frustrating symptoms — fatigue, mood instability, weight resistance, hormonal disruption — and who are open to a metabolic explanation. Its six food principles are deliberately structured to be agnostic across dietary philosophies, making the book accessible whether a reader leans toward plant-based eating or animal-based nutrition.
Robert Lustig has noted that it tells "the story of a medical system run amuck, and yet how you can be the good you want to see in the world" — a framing that signals the book is as much about patient empowerment as it is about any single intervention. With over a million copies sold since its May release, the book has clearly found a large and responsive readership among those seeking to reclaim agency over their long-term health.

Sources & Further Reading

The key facts and claims in this review are grounded in the retrieved, verified sources listed below.

  1. Cited in this review
  2. 1
    Good Energy: The Surprising Connection Between Metabolism and Limitless Health - Means MD, Casey; Means, Calley: 9780593712641 - AbeBooks

    abebooks.com

  3. 2
    ‎Good Energy: The Surprising Connection Between Metabolism and Limitless Health (Unabridged) by Casey Means, MD & Calley Means on Apple Books

    books.apple.com

  4. 3
    'Good Energy' by Casey Means MD and Calley Means Book Review: A Doable Guide for Improving Metabolic Health

    booksnreview.com

  5. Further reading
  6. 4
    Casey Means MD, Calley Means — author profileHigh-authority source

    Casey Means MD, Calley Means, Wikipedia

  7. 5
    Good Energy: The Surprising Connection Between ... - PMC

    pmc.ncbi.nlm.nih.gov

  8. 6
    Book — Casey Means MD

    caseymeans.com

  9. 7
    Good Energy by Casey Means, MD, Calley Means: 9780593712641 | PenguinRandomHouse.com: Books

    penguinrandomhouse.com

  10. 8
    Good Energy: The Surprising Connection Between Metabolism and Limitless Health | Barnes & Noble®

    barnesandnoble.com

  11. 9
    Good Energy: The Surprising Connection Between Metabolism and Limitless Health: Means MD, Casey, Means, Calley: 9780593712641: Books - Amazon.ca

    amazon.ca

  12. 10
    NPR

    NPR

  13. 11
    Red Pen Reviews

    Red Pen Reviews

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sustained critique of the American healthcare system

Skip if you want purely practical health protocols without an advocacy-driven critique of the American medical system.

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Outlive: The Science and Art of Longevity

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Both books argue that mainstream medicine fails chronic-disease prevention; Attia adds deep dives into longevity biomarkers and personalised testing protocols.

Peter Attia, like the Means siblings, builds his case around the idea that most physicians treat disease too late and measure the wrong things. Where Good Energy centres on cellular metabolism as a master lever, Attia organises his framework around four 'horsemen' — heart disease, cancer, neurodegenerative disease, and metabolic dysfunction — and the tactics to delay each. Readers who want more on VO2 max, continuous glucose monitoring, and lifespan vs. healthspan trade-offs will find Outlive a natural extension.

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The Obesity Code: Unlocking the Secrets of Weight Loss

Jason Fung

Fung dismantles calorie-counting orthodoxy through an insulin-resistance lens — the same metabolic root-cause framing Good Energy uses, with a sharper focus on fasting.

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When the Body Says No: Exploring the Stress-Disease Connection

Gabor Maté

Maté traces chronic illness to suppressed stress and emotional patterns — a different upstream cause that complements Good Energy's metabolic argument with compelling patient stories.

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In Defense of Food: An Eater's Manifesto

Michael Pollan

Pollan's landmark critique of nutritionism and processed food underpins the dietary principles Good Energy builds on — shorter, sharper, and a natural entry point.

In our catalogue

Salt Sugar Fat: How the Food Giants Hooked Us

Michael Moss

Investigative journalism exposing how the processed-food industry deliberately engineers addiction — the industry-side evidence for the dietary crisis Good Energy diagnoses biologically.

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How Not to Die: Discover the Foods Scientifically Proven to Prevent and Reverse Disease

M.D. FACLM Michael Greger, Gene Stone

If Good Energy's healthcare-system polemic felt too combative, Greger offers the same disease-prevention evidence base in a warmer, recipe-ready format with a whole-food plant-based lens.