From the Food & Health Skeptic http://john-ray.blogspot.com/:
Wow! I almost feel that someone has been listening to meBreastfed babies are smarter because their mothers are clever, not because of the nutritional benefits of breast milk, a study suggests. Previous trials have shown that infants fed on formula milk tend to have lower intelligence and the IQ difference has frequently been put down to a deficit of an omega 3 fatty acid, known as DHA, that is normally found in lower concentrations in formula milk. However, scientists at the Univerisity of Southampton, found no evidence of a link between intelligence and breastfeeding once the mother’s social class and IQ were taken into account.
Full article here http://www.timesonline.co.uk/tol/news/uk/health/article6996019.ece