Why Breastfed Babies Have Improved Immune Systems

This shows a mom breastfeeding a newbornRegulatory T cells expand in the first three weeks of life in breastfed babies, and are twice as abundant than in bottle-fed babies. Specifically, the bacterias Veillonella and Gemella are more abundant in the guts of breastfed babies. Veillonella and Gemella supportthe function of regulatory T cells.