Nutrition and IQ.
Children fed healthy diets at a young age may have a higher IQ when tested at eight years old. A study looked at the link between the eating habits of children at six months, 15 months and two years, and their IQ at eight years of age. Children breastfed at six months and who had a healthy diet regularly including foods such as legumes, cheese, fruit and vegetables at 15 and 24 months, had an IQ up to two points higher by age eight. Those children who had a diet regularly involving biscuits, chocolate, sweets, soft drinks and chips in the first two years of life had IQs up to two points lower by age eight.
University of Adelaide, Aug 2012