First of all, probiotics can be divided into three groups according to the purposes of their content: 1. General formula probiotics; 2. disease-specific probiotics; 3. person-specific probiotics. Undoubtedly, the ideal and most effective probiotic formula is the one that is specific to the person. However, disease-specific, accurate probiotics are also very valuable. In cases of intestinal microbiota imbalance, probiotic and prebiotic use is appropriate.