Size: 3 count. The secret to a healthy immune system just may be a healthy gut. The clinically studied strains in Probiotic 10 by Nature’s Bounty assist in the body’s natural digestive process and contributes to immune function.* Ultra Strength Probiotic 10 by Nature’s Bounty contains 10 distinct probiotic cultures to help supplement your body's natural diversity. Suitable for vegetarians, these friendly bacteria play an active role in aiding the body’s natural digestive process.* Nature’s Bounty Advanced Probiotic 10 contains 20 billion live probiotic cultures per serving at time of manufacture. Nature’s Bounty supplements combine science, nature and 50 years of expertise and innovation to provide effective ways support immune system health. When wellness is everything, the vitamin experts at Nature’s Bounty have everything you need to get there. Every Nature’s Bounty Probiotic product is quality tested in our microbiological laboratory throughout the manufacturing process to verify purity and potency.