Breast-feeding longer boosts baby's IQ later in life, study says 15 hrs ago Next time you wonder how your friends or colleagues got so darned smart, consider this: It may have something to do with how long they were breast-fed. A new study from Harvard University shows that children who are breast-fed longer have higher IQs than formula-fed kids, and the longer and more exclusively kids are given breast milk, the better. Researchers are careful to say it's an association, not causation, but each month the child was breast-fed exclusively in the first six months, he or she gained four-fifths of a point in verbal IQ by age 7. "It’s not like you get an early advantage that falls away. Their study showed that the advantage seems to persist,” said Sean Deoni, head of Brown University's Advanced Baby Imaging Lab. [Source] ..