25 Billion CFU guaranteed. 14 Probiotic strains. Immune health. Digestive balance. David Perlmutter, M.D.: Formulated by one of America's leading experts in the human microbiome, a board-certified neurologist, no. 1 New York Times best-selling author and fellow of the American College of Nutrition. Dr. Perlmutter created this unique formula with 25 Billion CFU of beneficial probiotics, made from diverse strains that are resistant to stomach acid and bile, for daily digestive and immune system support. Digestive System Support: Promotes digestive balance and regularity and helps relieve occasional discomfort. Immune System Support: 25 billion CFU, 14 probiotics. Shelf Stable (At expiration date under recommended storage conditions. Store in a cool, dry place): New desiccant-lined bottle technology for itself stable probiotics. No artificial colors or preservatives. Package size is determined by labeling information, not the number of servings in this container. The serving size and contents are clearly marked.