breast milk [AS, braest + meoluc] , human milk. The composition is mostly water, protein, fat, carbohydrates, amino acids, vitamins, minerals, enzymes, white cells, and long-chain fatty acids. The exact composition of breast milk changes as the infant ages and suckles. The World Health Organization (WHO) recommends that a child breastfeed for at least 2 years. Compare colostrum. See also breastfeeding.
