The difference between babies who drink formula milk and those who are breastfed is that breast milk is rich in immune substances, which can enhance the baby’s ability to fight diseases. Breast milk is the most ideal natural food for babies, its nutrients are the most suitable for babies to absorb and utilize, which is conducive to growth and development; therefore, breastfeeding is advocated for the healthy growth of babies. 1. Digestive system function development: breastfed babies digestive function is relatively good, drink formula baby due to the concentration of milk powder, water temperature and other aspects of the impact, it is easy to appear indigestion or acute and chronic gastroenteritis and other diseases, affecting the normal physiological function of the digestive system. 2. Bone development: Because breast milk contains nutrients in a ratio more suitable for babies, such as tyrosine, clear protein, and calcium and phosphorus ratio, etc., can better promote the development of the baby’s bones. 3. Immune system: Because breast milk contains a large number of immunoglobulins, which can promote the function of the immune system, compared to drinking formula baby immunity is high, the chance of disease is reduced. Parents are advised to breastfeed their babies as much as possible to help them grow and develop normally.