Why is human milk better than cow’s milk?

The nutritional content of milk is suitable for the growth and development needs of calves, and the nutritional content of human milk is most suitable for the growth and development needs of infants. In terms of protein composition, the protein in human milk is half less than that in cow's milk, but most of the protein in milk is casein. When it encounters rennet in the stomach, it forms a hard curd, which is difficult to be digested and absorbed. . 60% of the protein in human milk is lactalbumin, which forms soft flocculent curds in the stomach, easily absorbs the action of digestive enzymes, and can enter the small intestine from the stomach quickly, where it can be digested and absorbed better. From the perspective of fat composition, the fat in human milk contains more unsaturated fatty acids, which are easier to utilize than the saturated fatty acids in milk; and 95% of the fat in human milk can be stored in the baby's body; the retention rate of fat in milk in the baby's body is 61%, much less than human milk. Judging from the lactose content, the lactose content in human milk is higher than that in cow's milk. Lactose is very important for babies. It is not only beneficial to the formation of nerve function, but also to the development of skin, tendons, bones, and cartilage. It also helps with the absorption of calcium, and is beneficial to the absorption and retention of amino acids and nitrogen. The vitamins contained in human milk, such as B (thiamine) and C (ascorbic acid), can be fully supplied to babies. Although milk also contains these vitamins, at least some of them are destroyed after heating and sterilization. From an immune perspective, newborns who eat their mother's colostrum can acquire a high degree of immunity and resist many diseases, which is something that cannot be obtained by eating cow's milk. The immune substances in colostrum are not absorbed in the blood, but in the gastrointestinal tract. They are a group of substances called "colostrum particles" or "colostrum cells". There are two types of microorganisms. One is lysozyme, which can destroy bacterial cell membranes; the other is macrophages, which have similar properties to white blood cells and can digest harmful microorganisms or synthesize lysozyme and immune cells at the same time. Globulin, which will increase the baby's immunity and prevent poliomyelitis (poliomyelitis), influenza and diphtheria. There is also a nitrogen-containing carbohydrate in human milk. This microorganism can produce lactic acid and acetic acid from lactose, which can inhibit the growth of microorganisms. A diet high in lactose and low in protein can accelerate the growth of this microorganism. The ratio of lactose to protein in human milk is 7:1, while that of cow's milk is only 4:1. From a psychological point of view, human milk feeding is better for both the baby and the mother than cow milk feeding. The baby feels comfortable and warm when lying in the mother's arms, and has a sense of security. The exchange of milk and emotions between the mother and the baby during breastfeeding cannot be replaced by anything else. Breastfeeding can deepen the mother's own sense of responsibility. In addition, it is much more difficult for a baby to suck breast milk than from a bottle. His little mouth has to suck hard to suck out the milk. This can promote the development of the baby's neck and avoid crowding of teeth in the future. According to literature, infants fed human milk have a half lower incidence of heart disease than those fed cow's milk, and the incidence of ulcerative colitis is also lower.