The Claim
Following weight loss in individuals with obesity, daily energy expenditure decreases by 15%–20% beyond the amount predicted by reduced body mass, resulting in a persistent metabolic adaptation that promotes fat storage and weight regain unless calorie intake is further reduced.
What the research says
Roughly balanced
Support and challenge are close. The picture may shift as more studies come in.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
After people with obesity lose weight, their bodies burn 15% to 20% fewer calories per day than expected based on their new lower weight, which makes it harder to maintain the weight loss without eating even fewer calories.
See the scientific wording
Following weight loss in individuals with obesity, daily energy expenditure decreases by 15%–20% beyond what is expected from reduced body mass, creating a persistent metabolic adaptation that favors fat storage and weight regain unless calorie intake is further reduced.
After weight loss, fat cells shrink and release less leptin, which signals to the brain that the body is starving. The brain responds by lowering the metabolic rate, reducing body heat production, and slowing down how fast the body burns calories. At the same time, hunger signals increase and fullness signals decrease, making the person feel hungrier and eat more. These changes happen automatically and persist even after the person has lost weight, causing the body to store fat more easily and regain weight unless calorie intake is reduced further.
What the research says
1 studyStudy: Metabolic and appetitive regulation of adipocyte mass during treatment of obesity
After losing weight, your body slows down how many calories it burns and makes you hungrier, so it’s easier to gain the weight back unless you eat even less than before.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.