Grandparents are known for doting on their grandkids, but could their care be linked to making children fat?

A new study in the International Journal of Obesity finds that, among 12,354 British 3-year-olds, those who were looked after by grandparents part time showed a 15 percent higher risk of being overweight compared with children who were taken care of only by their parents.

Those cared for by grandparents full time had a 34 percent increase in risk of being overweight. Kids in formal child-care or who were cared for only by parents showed no greater tendency to being overweight.