Optibac probiotics for daily immunity is a natural supplement especially made to help maintain a normal immune system and energy levelsit is a unique and balanced formulation of 4 different strains of live cultures with vitamin c and also combined with 135mg of natural plant extracts of grape seed green tea and pine bark which are all rich in polyphenolsthis optibac probiotics immunity supplement is an expert blend of natural plant extracts and vitamin c which has antioxidant properties for