Many people who appear to eat whatever they like without gaining weight aren’t actually eating more than the rest of us, Melanson said. There’s little evidence to suggest that — without exercise — some people are born burning significantly more calories than others, said Dr. Ines Barroso, a researcher at the University of Cambridge in England who studies the genetics of obesity . For this study, researchers compared 1,622 healthy people with low body mass index (BMI) against 1,985 people with severe obesity and 10,433 control people of normal weight.
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