Weight loss is more than a matter of willpower—it's a biological challenge rooted in human evolution. The brain protects body fat as a survival mechanism from times of scarcity and can treat a previously higher weight as the body's set point, triggering increased hunger, cravings, and reduced energy expenditure after weight loss. This biological "memory" explains why weight regain is common after dieting. Medications like Wegovy and Mounjaro help by reducing appetite signals, though their effects may diminish when treatment stops, highlighting the importance of understanding weight management as an ongoing biological process rather than a temporary behavioral fix.
