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Why Most Diets Fail: A 10 Percent Loss Cuts Energy Expenditure 15 Percent, Ghrelin Stays High for Years, and Only a Quarter Keep the Weight Off

5 days ago
5 min read

Almost everyone who loses weight regains it, and the standard explanation - that people lack discipline - is both cruel and wrong. The research shows that losing weight triggers a coordinated biological defence: energy expenditure falls further than the smaller body explains, hunger hormones rise, satiety hormones fall, and these changes persist for years rather than weeks. Understanding this changes what a sensible weight-loss plan looks like, because it means the hard part is not the diet but the decade afterwards, and it means the interventions that work are the ones that continue.

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