Yeast flakes are a fungal microorganism, probiotics are the normal flora in the intestinal tract, the difference between the two have different uses and belong to different. 1. Yeast is a single-celled fungal microorganism invisible to the naked eye, yeast higher than 47 ° C can not grow, the appropriate growth temperature is generally between 20 to 30 ° C, there is a wealth of proteins, vitamins and enzymes and other physiologically active substances, often made into drugs such as yeast tablets for the treatment of indigestion caused by irrational diet. Yeast tablets overdose can lead to diarrhea, contraindications are not clear, can not be used with alkaline drugs, allergic to the product is prohibited during lactation in pregnant women under the guidance of a doctor. 2. Probiotics is the normal intestinal flora, can mediate the environment of intestinal flora, promote gastrointestinal motility to improve the symptoms of constipation and diarrhea, such as bacteria or fungi caused by acute and chronic diarrhea, constipation, flatulence, indigestion and so on. Probiotics can occasionally be seen in diarrhea, individual patients will have a rash, can not be taken with antibiotics, the temperature of the water should not be more than 35 ~ 40 ℃, in order to avoid the death of probiotics failure. There is discomfort recommended to the regular hospital, under the guidance of the doctor the correct use of drugs in order to avoid causing adverse effects.