The idea that 3,500 calories equals one pound of fat has become weight-loss folklore. It appears in diets, apps, and advice given to patients every day. Yet this simple formula was never meant to describe the living human body.
Where Did the Calorie Formula Come From? examines the historical roots of the calorie rule, the assumptions behind it, and why treating the body like a Bunsen burner leads to frustration and failed expectations. Written by Dr Samir Contractor, a laparoscopic and bariatric surgeon, this physiology-based guide explores calorie theory, fat loss, thermodynamics, and the reality of metabolic adaptation.
Readers will understand why energy balance is more dynamic than the classic equation suggests, how the body adjusts to calorie restriction, and what a more accurate physiological view means for sustainable weight management.
