The role and efficacy of Bacillus subtilis is mainly to restore the intestinal flora, regulate intestinal peristalsis and digestion and absorption, and can treat indigestion and constipation caused by intestinal flora imbalance. 1. Role: Bacillus subtilis is a kind of aerobic bacteria, which can directly supplement the normal intestinal physiological flora, play the role of inhibiting pathogenic bacteria, but also inhibit the production of intestinal toxins, and promote the digestion and absorption of nutrients. Therefore, Bacillus subtilis has the function of restoring normal intestinal flora, regulating intestinal motility and digestion and absorption. 2. Efficacy: Bacillus subtilis is mostly used in the treatment of dyspepsia, constipation and other diseases caused by intestinal flora imbalance, effectively relieving diarrhea, abdominal distension and other uncomfortable symptoms caused by these diseases. The use of Bacillus subtilis must be under the guidance of a doctor, do not use on your own to avoid harm to the body.