Doritos made me stupid or do stupid people eat Doritos?

Toddlers' Junk-Food Diet May Lead to Lower IQ - correlation or causation, you decide.

Doritos made me stupid or do stupid people eat Doritos?

Researchers from the University of Bristol looked at data on 3,966 children born between 1991 and 1992, who were part of the Avon Longitudinal Study of Parents and Children (ALSPAC). The children's parents had completed surveys on their kids' diets at ages 3, 4, 7 and 8.5, and the children's IQs were measured at age 8.5. (More on Time.com: Is School Lunch Making Your Kids Fat?)

Overall, kids who ate junky fast-food diets at age 3 had a small drop in IQ at age 8.5, compared with kids eating healthy foods. The association persisted even after researchers controlled for other environmental factors that can influence IQ, such as parental education level, maternal diet in pregnancy, socioeconomic status and stressful life events

Read more: http://healthland.time.com/2011/02/08/toddlers-junk-food-diet-may-lead-to-lower-iq/#ixzz1DOSyZvGF