"I was blown away by this book. Through many years of research and an immersion in cutting-edge research, James Clement has produced the best book I’ve read on fasting and autophagy. Definitely worth the read!"
—David A. Sinclair, PhD, New York Times bestselling author of Lifespan

"The Switch will undoubtedly rewrite your health destiny."
—David Perlmutter, MD, #1 New York Times bestsellinga uthor of Grain Brain and Brain Wash

"James Clement is a rare trailblazer in scientific circles. The Switch offers a paradigm shift in the way we think about health—and how to avoid decline and illness. This is a must read."
—Mark Hyman, #1 New York Times bestselling author of Food: What the Heck Should I Cook?

"There is an easy way to make your cells stronger and younger. James Clement has done the science to crack the code for all of us to stay younger longer. Read this book!"
—Dave Asprey, founder of Bulletproof and New York Times bestselling author of The Bulletproof Diet

"The Switch is a sweeping and fascinating journey on the science of aging and life-extension. Additionally, Clement offers years of distilled research with a practical guide to switch on the body’s innate ability to rejuvenate itself to live a longer and healthier life."
—Travis Christofferson, author of Tripping Over the Truth and Curable

"The Switch is a breakthrough twenty-first-century antiaging book!"
—Durk Pearson, Scientist and Coauthor of the #1 national bestseller Life Extension

"A must-read for anybody interested in promoting lifespan and health span."
—Dr. Steve Horvath, Professor of Human Genetics & Biostatistics at UCLA

“The Switch is a very balanced book, with plenty of nuanced suggestions for how you can make your food situation just a little bit better without making too many radical changes.”—Mashable