Many probiotic strains are needed to support good health. You take a multi-vitamin and mineral supplement every day because your body needs all its vitamins and minerals. You take a daily multi-strain probiotic supplement for the same reason. Your body needs more than just a few strains to stay healthy. Every day, the good, natural flora in your body is killed off by stress, junk food, medications, chlorinated water, and a toxic environment. iFlora Multi-Probiotic Formula contains 16 strains that supplement natural flora colonies that exhibit favorable effects on digestive and immune health. This premier blend shows its positive effects on good flora, urinary tract, bowel function, and skin. All strains survive stomach acid for maximum effectiveness.