Genuine Health Advanced Gut Health Probiotic 15 Billion - Combines 15 strains, carefully selected for whole body health. A vegan, delayed-release capsule with a fermented prebiotic ensures that the strains pass through the stomach acid, reaching the gut where they thrive. This multi-strain, daily probiotic combines bifido and lacto bacteria that mimic the balance of human microbiome. Shelf-stable with no need to refrigerate.