Probiotics include both medications and supplements, with medication benefits and efficacy to improve various symptoms caused by intestinal flora imbalance. Nutraceuticals, on the other hand, have the function of regulating intestinal flora. Probiotics are a group of active microorganisms that are beneficial to the host, improve microecological balance and are beneficial to the intestinal tract. They include Clostridium casei, Lactobacillus, Bifidobacterium and so on. Clinical drugs commonly complex probiotics, such as Bacillus subtilis diabolicus enteric capsules, Clostridium casei enterococci triple antibiotic tablets. Benefits and efficacy is to improve the intestinal flora imbalance caused by a variety of symptoms, such as diarrhea, constipation, diarrhea constipation alternation and enteritis. The medication should be taken care to be applied under the supervision of a doctor. In addition to drugs, there are some probiotic health products, such as probiotic powder, with the function of regulating intestinal flora. However, it should be noted that health products can not replace drugs.