Want to reach your optimal weight while preventing heart disease, type 2 diabetes, dementia and cancer AND while feeling energized as you live longer? Eat more fat. That’s what Dr. Mark Hyman—one of the world’s leading Functional Medicine doctors—tells us. This book is ridiculously packed with Big Ideas—walking us through the eye-opening science of why fat is awesome along with a plan on how to “reboot our biology to our original factory settings” via a 21-day program followed by a long-term plan to rock it. We explore the surprising truth about fat, good fats vs. bad fats, going pegan (think: best of vegan + Paleo), a quality carb, and dealing with root causes rather than symptoms.