Fed Up: What Evolution Reveals About Food, Diet, Health, and Eating Well

In this book, Daniel Lieberman draws on evolutionary biology, anthropology, physiology, anatomy, medical science, and history to examine how humans evolved to eat and why modern diets generate so much confusion and conflict. Lieberman evaluates a wide range of contemporary diets—including Paleo, Mediterranean, intermittent fasting, vegetarian, vegan, and low-carb approaches—while exploring the health consequences of industrialized and ultra-processed foods. The book argues that there is no single “natural” human diet and offers an evidence-based framework for thinking about food, health, and eating well in the modern world.