1, breast milk will produce more immunity in the body In breast milk there are a lot of anti-infection and anti-inflammatory factors, many of them, such as iron lactic protein, analyzing the urine of infants fed formula will find a large number of iron lactic protein, which is why infants fed formula are more prone to urinary tract infections. This also shows that breast milk can trigger localized resistance. Infants who eat formula milk powder because the formula milk powder iron milk protein content is higher, the stomach of small infants absorption ability is not strong, it is easy to be filtered out caused by urinary tract infections. 2, eat breast milk higher level of immunity Breast milk in the baby to provide protection at the same time, but also reduces the risk of the baby to get other types of infections, but does not mean that breast milk is a substitute for vaccination. If your baby has been vaccinated and is also drinking breastmilk it will make your baby’s certain antibodies become stronger and more effective against tetanus, diphtheria toxoid and influenza type B. Therefore, compared to feeding formula babies, breast milk can also make the baby’s vaccination resistance become stronger. 3, breast milk is not sterile More and more research is about gut microorganisms, these microorganisms include bacteria and immune cells, etc., which play a very important role in human health, although human beings still do not know how these microorganisms affect human health. When a person is young, the microorganisms in the gut are very susceptible, and as they grow older, the microorganisms in the gut become stronger and less susceptible to external influences, but they do not remain unchanged. Breastfed babies also get bacteria into their bodies from their mother’s skin or from the milk with them when they drink breast milk. These bacteria are beneficial to the baby’s body, and when they enter the baby’s body they form a “family” on the skin or in the intestines, and build up the microbiome in the intestines to keep the body healthy. Breast milk also contains prebiotics (food for bacteria). The most abundant substance in breast milk is lacto-oligosaccharides, which are the most natural prebiotics.