FortéBiotic+ ATB is a food supplement that combines two microencapsulated microbiotic strains (10 billion CFU) and a yeast (2 billion CFU). The FortéBiotic+ ATB formula combines two microencapsulated microbiotic strains (10 billion CFU) and a specific yeast, Saccharomyces boulardii (2 billion CFU), which act synergistically. Directions for use: Take one capsule daily with a large glass of water (200 ml). 10-day renewable program.