London, Dec 11 : Researchers at Dundee University have identified a "greedy gene" which causes people to eat an extra 100 calories on average at a single meal.
Scientists found that the gene, called FTO, appears to encourage people to opt for high calorie foods containing sugar and fat, reports the Telegraph.
The research found that the gene is carried by more than half of the population and encourages children to eat an average of 100 extra calories per sitting.
FTO has previously been linked to an increased risk of becoming overweight or obese.
However, scientists have struggled to understand if it affects calorie intake or how people's bodies process fat.