Human breast milk enhances brain development and improves cognitive development in ways that formula cannot. One study has found that the average I.Q. of 7 and 8 year old children who had been breastfed as babies was 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. level. Another study to support this statement was done in New Zealand. Here an 18 year longitudinal 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.
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