Nature's Bounty Ultra Strength Probiotic 10 contains 10 distinct probiotic cultures to help supplement your body's natural diversity.* These organisms play an active role in aiding the body’s natural digestive process.* Nature's Bounty Ultra Strength Probiotic 10 contains 20 billion live probiotic cultures per serving at time of manufacture.* Probiotics not only support microbial balance of healthy intestinal flora, but assist in the body’s natural digestive process, and contribute to immune function.* Probiotics help support a favorable environment for the absorption of nutrients.*