Sundown Naturals Probiotic Balance capsules support digestive, intestinal, and immune health help maintain your digestive system's natural balance. Just one capsule a day provides you with 10 billion active cultures to help maintain a favorable intestinal balance, and a favorable environment for the absorption of nutrients support healthy GI function and promote digestive health. Since a large percentage of the body's immune system is located in the gastrointestinal tract, Probiotic Balance also supports healthy immune function. Sundown Naturals Probiotic Balance contains a clinically studied strain, called Lactobacillus plantarum 299v (Lp299v). Why is Lp299v so important for digestive health? Just like vitamins and minerals, each probiotic strain has an individual role to play. Lp299v is a clinically studied active probiotic strain that's been shown to deliver additional good bacteria to your intestinal tract. Made from naturally occurring cultures, Lp299v supports digestive health and gastrointestinal function by helping to maintain a healthy natural balance within your digestive system.