Unsuitable milk powder includes unsuitable varieties, such as lactose intolerant children, who are given milk powder containing lactose, the child will have indigestion symptoms, such as children with milk protein allergy, fed with ordinary milk powder, or partially hydrolyzed milk powder, will have indigestion symptoms, constipation, diarrhea, bloating, poor appetite, and even over time will affect growth and development, including weight The problem is that the growth and development of the baby will be affected over time, including weight gain, delayed height development and so on. There is also a difference in the ratio of milk powder, some parents are very arbitrary, such as requiring 30ml of milk with 1 scoop of milk powder, maybe about 30ml of water, Qi 1 scoop or more than 1 scoop, sometimes it is full of 1 scoop, sometimes it is flat, sometimes less than 1 scoop, this difference in the ratio can cause indigestion symptoms in children.