Researchers say the finding in the Journal of Clinical Endocrinology and Metabolism provides another important clue to a very complicated puzzle.
Gene may be linked to obesity in kids
Researchers now think children with this gene find it harder than others to tell when they are full.
Their study of more than 3,000 children shows those with the FTO gene tended to over eat.
They were also less likely to have their appetite switched off when they should be full.
