By the time they reach their late 20s to early 30s, people who were obese between 12 and 21 are more than seven times more likely than normal-weight or overweight peers to develop severe obesity — defined as having a body mass index, or BMI, of 40 or more — according to the study published in the Journal of the American Medical Assn.

Obesity often follows the young into adulthood – latimes.com