Kramer et al1 present evidence that breastfeeding improves children's cognitive development. They discuss 2 classes of explanation for their findings, noting that the superior cognitive development of breastfed children may be due either “to some constituent of breast milk” that promotes improved development or “to the physical and social interactions inherent in breastfeeding.”1(p582)
Sullivan JL. Cognitive Development: Breast-Milk Benefit vs Infant Formula Hazard. Arch Gen Psychiatry. 2008;65(12):1456. doi:10.1001/archpsyc.65.12.1456-a
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