Probiotic 10 contains over 20 billion live Probiotic cultures guaranteed at time of manufacture and 10 Probiotic strains in one convenient capsule. This formula contributes friendly probiotics to the digestive and immune systems.** The beneficial bacteria are on your side for helping you be your healthy best.** This new formula also contains 25 mcg of Vitamin D to support immune function.* Convenient, one-per-day formula of easy-to-swallow capsules. Store in a cool, dry place away from direct sunlight.