Udo’s Choice Adult’s 50+ Blend Microbiotics contain 7 specific bacterial strains at an appropriate strength, designed for optimum bowel health. Seniors generally need a large quantity of beneficial bacteria and several varieties of bifidobacteria for optimum bowel health. The specific strains used in Udo’s Choice Adult’s 50+ Blend have been specially chosen for their value to lower bowel health and have been formulated to the appropriate viable count. Each vegetarian capsule contains: 34 billion viable cells at time of manufacture in a base of potato starch, ascorbic acid, stearic acid, and silicon dioxide. Capsule: Hypromellose.