The ratio of lactalbumin to casein in human milk and cow’s milk is different. The ratio of lactalbumin to casein is 2:1, and the ratio of cow’s milk is 1:4.5. lactalbumin can promote the synthesis of sugar, and the formation of small clots in the stomach after acid, which facilitates digestion. In contrast, most of the milk is casein, which is easy to form hard lumps in the baby’s stomach, not easy to digest, and can make the stool dry. 2, amino acids human milk contains more taurine than cow’s milk. Taurine is combined with bile acid, which plays an important role in the digestion process, and it can maintain the stability of cells. 3. Lactose Lactose in breast milk is higher than cow and goat milk, which has a positive effect on infant brain development. The type B lactose contained in breast milk has the effect of indirectly inhibiting the growth of E. coli. In contrast, cow’s milk contains alpha-lactose, which indirectly promotes the growth of E. coli. In addition, type B lactose also helps the absorption of calcium. 4, fat Breast milk has few fat globules and contains a variety of digestive enzymes, plus the lingual lipase secreted by the tongue and throat when the child sucks the milk, which helps digestion of fat. Therefore, it is more beneficial to newborns and premature babies who lack pancreatic lipase. In addition, the unsaturated fatty acids in breast milk are beneficial to the development of the brain and nerves of infants. 5. Inorganic salts The ratio of calcium to phosphorus in breast milk is 2:1, which is easy to absorb. It has a certain effect on the prevention and control of rickets. The milk is 1:2, not easily absorbed. 6, trace elements The absorption rate of zinc in breast milk can reach 59.2%, while cow’s milk is only 42%. The absorption rate of iron in breast milk is 45%-75%, while the absorption rate of iron in cow’s milk is 13%. In addition, breast milk is rich in copper, which has a great effect on the protection of the baby’s delicate cardiovascular.