Credit: CC0 Public Domain

In the largest study of the genetics of childhood obesity, researchers have looked at why some children gain weight very easily.

By the age of five, one in four are either overweight or obese. While easy access to high calorie foods and sedentary lifestyles have driven the rise in childhood in recent years, some children seem able to eat what they like and remain thin, while others very easily. An individual’s risk of gaining is strongly influenced by their , and some children who gain a lot of weight, are