Today, about one in three American kids and teens is overweight or obese, nearly triple the rate in 1963. Among children today, obesity is causing a broad range of health problems that previously weren’t seen until adulthood. These include high blood pressure, type 2 diabetes and elevated blood cholesterol levels. There are also psychological effects: Obese children are more prone to low self-esteem, negative body image and depression. And excess weight at young ages has been linked to higher and earlier death rates in adulthood.