In most cases mixed breastfeeding does not affect the baby’s gut. Mixed breastfeeding refers to breastmilk and formula feeding at the same time, and mixed feeding needs to use the correct method, the correct mixed feeding will not affect the baby’s intestinal tract. You can supplement formula when breastfeeding is insufficient, which is a complementary mixed feeding method that is more favorable to the absorption and digestion of the infant’s intestines. At the same time, you need to pay attention to the infant’s digestion after feeding, if the infant has diarrhea or indigestion after eating formula, it is recommended to stop mixed feeding immediately. If the infant does not show any adverse symptoms during mixed feeding, the amount of formula can be gradually increased, which generally will not affect the infant’s intestinal tract.