According to a new article by Michael Goran and colleagues it depends on which components of breast milk, (sugary complex carbohydrates called human milk oligosaccharides (HMOs) are present. 25 mother-infant dyads were studied at one and six months of age. Goran is quoted in the Irish Times saying, “But typically we think of obesity risk kicking in after weaning, the timing of introduction to solid foods, early exposures to sugary beverages. Clearly there is something going on before weaning even in babies who are exclusively breast-fed.”
Two HMOs, LNFPII and DSLNT, were each associated with about an extra pound of fat mass at 6 months. Another, LNFPI, seemed to be protective, linked to a pound less of fat at six months.