There is currently no probiotic that is best for regulating the intestinal tract. Bifidobacterium lactis triplex and Bacillus subtilis doublex are commonly used to regulate the intestinal function. 1. Bifidobacterium lactis triplex: a compound preparation composed of Bifidobacterium lactis, Lactobacillus lactis, Enterococcus faecalis, Isolactose, etc. It is a kind of better intestinal micro-ecological balance regulator, which can directly replenish the physiological bacteria and inhibit the harmful bacteria in the intestinal tract. It can reduce the production and absorption of intestinal toxins, reduce the burden on the liver, and promote the decomposition and absorption of nutrients by the body. 2. Bacillus subtilis dictyostelium: It can be used for diarrhea, constipation, flatulence and other indigestion symptoms caused by intestinal flora imbalance. It can achieve the purpose of adjusting the balance of intestinal flora by inhibiting germs to promote nutrient digestion and absorption, and inhibiting intestinal toxin production. It should be noted that all the above drugs should be taken under the guidance of a doctor and should not be used without authorization.