A variant of a common gene can make a person more likely to be obese than those without the gene, according to a recent British study. The research also marks the first large-scale trial to pinpoint a genetic link between obesity and type 2 diabetes.

Zeroing in on a genetic link may explain why so many Americans and Europeans are overweight and obese. Could the new evidence cause those with the gene to feel helpless to overcome their weight problem, or could identifying the gene help people avoid gaining weight? Perhaps both, experts say, although it’s too early to tell.

Obesity gene may not be easy excuse