Probiotics are best for newborns about half an hour after feeding, and are mostly taken when they have diarrhea, bloating, indigestion and other symptoms. Probiotics are active bacteria, mainly planted in the intestinal tract, to help regulate the intestinal flora environment and help the body digestion and absorption. The human stomach stores stomach acid, which will kill probiotics, so you need to choose to take probiotics when there is relatively less stomach acid. About half an hour after a newborn baby eats milk, stomach acid is neutralized and diluted and relatively reduced, so taking probiotics at this time is more conducive to their survival and successful colonization in the intestine. In addition, probiotics should be taken only when the newborn has digestive symptoms, because probiotics are not completely harmless to human body. Because high temperature can inactivate probiotics, it is recommended to take probiotics with warm water, preferably not more than 40℃. In addition, be careful not to take probiotics on an empty stomach or before bedtime to avoid causing gastrointestinal discomfort.