Probiotics should not be taken more than once, although probiotics are relatively safe drugs, almost no toxic side effects, suitable for infants and children, maternal and lactating women. However, for all western drugs, including synthetic probiotic products, as the saying goes, medicine is three times more toxic, and only when there is discomfort can you weigh the pros and cons of using medication. But all drugs should not be used in excess of the amount, not beyond the instructions, and not long-term abuse of drugs. If you use probiotics in excess or use synthetic probiotic products for a long time, it may cause the intestinal tract to lose its ability to reproduce beneficial bacteria. It may also affect the body’s sugar metabolism and fat metabolism, and there may be immune dysfunction, etc. Therefore, probiotics should not be taken more than once and must be used according to medical advice.