Obesity: From Biology to Behavior

In Obesity: From Biology to Behavior, Professor Bogdan Timar reveals the science behind why we gain weight, why losing it is so difficult, and why the body often fights every attempt to become lighter. This is not a book of blame, myths, or simplistic advice. It is a powerful, accessible exploration of the hidden biology of hunger, fat storage, appetite, cravings, metabolism, and weight regain.

With the storytelling energy of a bestseller and the scientific depth of a physician-scientist, the book takes readers from our evolutionary past to the ultra-processed present, showing how human biology was built for scarcity—not abundance. It explains why obesity is a chronic disease, why “eat less, move more” is often not enough, and how modern treatments, including GLP-1 medications and metabolic surgery, are reshaping the future of care.

Clear, compassionate, and eye-opening, this book is for anyone who has ever struggled with weight, loved someone who has, or wanted to understand one of the defining health challenges of our age.

This is the story of how the human body was built, how the modern world changed the rules, and why understanding obesity may be the first step toward changing its future.