"Good" cholesterol and other types of healthy fats and brain-boosting omegas in human milk have shown to support the growth of nerve tissue. That is why it's thought that breast milk enhances brain development and improves cognitive development in ways that formula can't. Studies have shown that the average I.Q. of 7 and 8 year old kids that were breastfed as babies was on average 10 points higher than their bottle fed peers. All of the children involved had been born prematurely and tube fed the human milk, indicating that the milk itself, not the act of breastfeeding, caused this difference in I.Q. Another study to support this statement was done in New Zealand over an 18 year case study of over 1,000 children found that those who were breastfed as infants had both higher intelligence and greater academic achievement than children who were infant-formula fed.