“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

 

“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

 

“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

 

“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 In The Metabolism Fix, JJ Virgin replaces that outdated prescription with a science-based strategy centered on muscle.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