The Metabolism Fix

“The quality of your life is determined by the quality of your energy. The Metabolism Fix gives you the roadmap to build the strength, vitality, and metabolic health that fuel an extraordinary life. JJ Virgin has created a blueprint that can change not only how you age—but how you live.”
–Tony Robbins, New York Times bestselling author of Life Force

“Muscle isn’t vanity—it’s your metabolic currency. The Metabolism Fix provides a clear, protein-first, strength-centered roadmap for improving body composition, supporting metabolic resilience, and aging powerfully.”
–Gabrielle Lyon, M.D., New York Times bestselling author of Forever Strong and The Forever Strong Playbook

“Most people who think they need to eat less actually need a better strategy for building and protecting muscle. In The Metabolism Fix, JJ Virgin connects the dots between muscle, metabolic health, protein, movement, and recovery—and turns the science into a practical plan people can actually live with.”
–Mark Hyman, M.D., New York Times bestselling author of The Blood Sugar Fix

“The Metabolism Fix is the book every woman in midlife needs on her shelf. JJ Virgin makes the science of muscle, metabolism, and powerful aging actionable and empowering. This isn’t about shrinking; it’s about building the strongest version of yourself starting today!”
–Tamsen Fadal, New York Times bestselling author of How to Menopause and host of The Tamsen Show Podcast

“Women have been taught to shrink themselves for far too long. JJ Virgin gives us a better goal: get stronger. The Metabolism Fix brilliantly explains why muscle is one of our greatest metabolic assets, especially as we move through midlife. This book will change the way women think about weight loss, strength, and aging.”
–Mindy Pelz, D.C., New York Times bestselling author of Fast Like a Girl

“JJ Virgin has done it again! The Metabolism Fix is a powerful guide to understanding why muscle matters when transforming your metabolism, and creating a stronger body. If you’re ready to feel your absolute best, this book is a must-read.”
–Gabrielle Bernstein, New York Times bestselling author of The Universe Has Your Back and Self Help

“To have a healthy brain, you must have a healthy body. In The Metabolism Fix, my friend and mentor JJ Virgin connects metabolic health to energy, focus, mood, and long-term brain health. Her practical plan for building muscle, prioritizing protein, and recovering well can help you create a stronger body, a healthier brain, and a better life.”
–Daniel G. Amen, M.D., New York Times bestselling author of Change Your Brain, Change Your Life and founder of Amen Clinics

“The Metabolism Fix delivers a message that deserves to be heard: growing older does not have to mean growing weaker. JJ Virgin brilliantly reframes muscle as essential metabolic machinery, fundamental to our strength, resilience, independence, and longevity. More than a book about metabolism, this is a powerful blueprint for taking control of how we age.”
–David Perlmutter, M.D., New York Times bestselling author of Grain Brain and Brain Defenders

“Muscle is medicine! In The Metabolism Fix, JJ Virgin expertly proves that what you put on your plate is connected with the strength you build if you want optimize your health as you age. This is a smart, practical book grounded in real science. If you’re tired of dieting and ready to work your biology, start here.”
–William W. Li, M.D., New York Times bestselling author of Eat to Beat Disease and Eat to Beat Your Diet

“The worst possible way to try to lose weight is: eat less, do more cardio, and burn through the muscle that keeps your metabolism online. JJ Virgin fixes that. The Metabolism Fix is the muscle-first biohack for losing fat without becoming weaker, slower, and easier to kill. JJ shows you how to use protein, resistance training, smart movement, and recovery to upgrade your metabolism and perform better at any age. Read this before you start another diet—or use a GLP-1 without a plan to protect your muscle.”
–Dave Asprey, New York Times bestselling author of The Bulletproof Diet

“For too long, women have been prescribed smaller portions, more cardio, and lower expectations for what their bodies can do as they age. In The Metabolism Fix, JJ Virgin replaces that outdated prescription with a science-based strategy centered on muscle. She shows how protein, resistance training, recovery, and metabolic health work together to build strength, improve body composition, and support a longer, more vital life.”
–Sara Szal M.D., New York Times bestselling author of Women, Food, and Hormones

“In midlife it’s as if we are on a quest to build muscle while we burn fat and yet often this quest feels confusing and without a clear direction. That is until now. JJ Virgin, one of the most trusted voices in the health space refines how you can once again take control of your body in her book The Metabolism Fix—it is not only accessible but actionable and will lead you towards a stronger you.”
–Vonda Wright, M.D., New York Times bestselling author of Unbreakable and orthopedic sports surgeon

“The Metabolism Fix is a fantastic, evidence-backed guide to everything you need to age gracefully: build muscle, improve body composition, and feel strong every step of the way.”
–Marie Forleo, New York Times bestselling author of Everything is Figureoutable

“I’m blown away! The Metabolism Fix delivers cutting-edge science in a way that’s simple, inspiring, and easy-to-implement. If you want to transform your body, this book is the roadmap to do it.”
–Shawn Stevenson, nationally bestselling author of Sleep Smarter and Eat Smarter

“The reality is, after 40, most women accept a slower metabolism, a thicker midsection and a loss of muscle as an inevitable part of aging. The changes that often accompany a decline in hormones, doesn’t mean you’re screwed. You need real answers and a plan. JJ Virgin gives readers a simple, realistic, customizable plan to ignore their metabolism, build muscle and improve body composition. This book was designed for anyone who is determined to age powerfully.”
–Chalene Johnson, New York Times bestselling author of PUSH and host of The Chalene Show

“JJ Virgin is one of the best communicators I know when it comes to taking complex science and making it easy to understand and apply. The Metabolism Fix is a perfect example. JJ puts muscle at the center of the conversation and then simplifies the path forward into three powerful words: Fuel, Move, Recover. It’s an evidence-based framework for anyone looking to build muscle, lose body fat, and improve metabolic health. And in true JJ fashion, she doesn’t just give you the Science – she gives you the motivation to put it into action!”
–Bill Campbell, Ph.D., FISSN, CSCS, Professor of Exercise Science and Director of the Performance & Physique Enhancement Laboratory, University of South Florida

JJ Virgin is a renowned keynote speaker, triple board-certified nutrition expert, fitness hall-of-famer, and four-time New York Times bestselling author.

JJ has been featured on Dr. Phil, the Today show, and Rachael Ray. She cohosted TLC’s Freaky Eaters and has hosted two PBS specials. JJ is the chair of A4M’s Profitable Practice Blueprint, the nutrition and fitness speaker for Tony Robbins, and the chief metabolic health officer for Lindora Metabolic Health and Wellness.

She regularly speaks to audiences of over 10,000 and has shared the stage with icons like Seth Godin, Gary Vaynerchuk, and Dr. Mark Hyman. As founder of the Health Business Growth Collective (formerly Mindshare), she leads the most influential community of health entrepreneurs, helping practitioners scale their businesses and amplify their impact.

Her Muscle Changes Everything philosophy empowers people to break free of outdated weight loss dogma and embrace aging powerfully.

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