"A study of 90,000 people has uncovered new genetic variants that influence fat mass, weight and risk of obesity. The variants act in addition to the recently described variants of the FTO gene: adults carrying variants in both genes are, on average, 3.8 kg (or 8.5 lb) heavier...8.5 pounds!
Importantly, the effects of the new gene add to those of FTO; people who carried both the FTO variant and new variants were on average 3.8 kg (8.5 lb) heavier. "
Clearly that is the difference between normal weight and obesity.
BTW, what happened to the other many thousands of genetic links to obesity?
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