This book investigates how modern food environments disrupt natural appetites and proposes a return to instinctual eating for better health. Based on research into animal feeding behaviors, the authors, David Raubenheimer and Steven D. Simpson, present a framework for understanding human hunger and satiety. They argue that the 21st-century food landscape, characterized by hyper-palatable, nutrient-poor foods, actively interferes with our ability to recognize and respond to our body's true nutritional needs. The book aims to equip readers with methods to counteract these environmental influences and re-establish a healthy, balanced approach to eating.

The book is presented as a guide to developing a natural approach to healthy eating, drawing parallels with animal instincts. It aims to explain how the contemporary food environment interferes with appetite and hunger. The authors illustrate methods for countering these effects and re-attuning to the body's nutritional requirements. The premise suggests a focus on behavioral science and nutritional psychology to achieve balanced eating.