An obese child 6 to 9 had a 37 percent chance of being an obese adult if neither parent was obese. But if at least one parent was fat, the child’s change of growing up to be fat nearly doubled, to 71 percent.
The work fits well with current thinking about adult obesity, medical experts say. The condition appears to have a strong genetic component — most fat people are thought to inherit genes that keep them fat, despite their best efforts to reduce. — NY Times