Obesity rate will reach nearly 50% by 2030 in the U.S., says OECD The obesity rate for American adults (aged 15 and over) came in at a men, though obesity rates for the male population are growing rapidly. Meanwhile, a broader sampling of 3 to 17-year olds shows that obesity obesity rates are expected to increase until at least 2030, led by the obesity puts individuals at risk from related illnesses — diabetes, * There may be an ‘obesity effect’ on your investments