"Researchers in Britain have discovered that feeding your children junk or processed foods can actually lower their IQ. The diets and general health and well-being of 14000 children born from 1991 to 1992 in western England were monitored at ages three, four and a half, seven and again at age 8. It was found that a poor diet during the early developmental years could in fact lead to a lower IQ by the age of 8." (Quoted from article)