Hormonal

Intentional weight loss triggers strong counterregulatory physiological responses, specifically increased hunger and reduced energy expenditure (hypometabolism), which actively defend the original body weight and facilitate rapid weight regain.

Expect that losing weight will make you hungrier and your metabolism slower. This is a biological defense, not a personal failure. To maintain loss, you must actively counterbalance these adaptations, likely through strategies like increased physical activity and specific dietary choices (e.g., fiber) that support metabolic rate, as standard willpower-based approaches often fail against this biological pushback.