Children eating the most dairy products were nearly twice as likely to be overweight, compared with those consuming the least dairy products, according to a new study published in Nutrition Journal, based on results of 1,764 children. But grains and vegetables had the opposite effect. The more of these foods children ate, the less likely they were to be overweight. Curiously, in this study, junk food was not a problem. Researchers speculated a few reasons for this, including parents of overweight children tend to underreport consumption of junk food by their kids.

Matthews VL, Wien M, Sabaté J. The risk of child and adolescent overweight is related to types of food consumed. Nutr J. 2011;10:71.