BIFILAC Lozenge contains, Streptococcus faecalis/ T-110, Clostridium butyricum TO-A, Bacillus mesentericus TO-A which are patented strains, licensed from TOA Pharmaceuticals Co. Ltd, Japan and Lactic acid bacillus (Lactobacillus  sporogenes), which is a time-tested probiotic strain. Through their symbiotic action they produce certain factors which inhibit bad micro-organisms and increase the count of beneficial  micro-organisms in the oral cavity.