Breast milk a bulwark for babies
By Nicholas Wade | The New York Times | Updated: 2010-08-22 07:40
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Babies have untrained immune systems that cannot counteract the effects of acids, the way adults do. John Moore / Getty Images |
A large part of human milk cannot be digested by babies and seems to have a purpose quite different from infant nutrition - that of influencing the composition of the bacteria in the infant's gut.
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