Newborns change milk powder easily cause gastrointestinal discomfort, resulting in indigestion, diarrhea and so on. The stomach and intestines of newborns are not yet fully developed, the stomach and intestines are still relatively fragile, digestion and absorption ability is not very good. The newborn’s stomach and intestines just adapted to a kind of milk powder, and then change to another kind of milk powder, it needs a re-adaptation process. Once the newborn’s stomach is not adapted to the new milk powder, not only will lead to the failure of the milk powder, but also prone to indigestion, diarrhea and other phenomena. Breastfeeding is usually recommended for newborns. If you need to choose formula feeding, it is recommended that newborns do not change milk powder in the short term, so as to avoid triggering adverse reactions. Generally, after one year of age, you can consider changing the same brand of milk powder for infants and young children, such as upgrading one-stage milk powder to two-stage milk powder. Moreover, the process of changing milk powder must be gradual, from adding a small amount to gradually complete the replacement.