Digestive health. Support digestive health. 15 billion active cells (at time of manufacture). Beneficial bacteria are essential for optimal gut functioning. In addition, the majority of our immune system is housed within the digestive tract, making it even more important to maintain proper gut health. Just one capsule of our probiotic quattro contains four different strains of the 'good' bacteria needed for a healthy body. The unique capsule matrix protects the bacteria and allows delivery to the small intestines. What's more, while this product doesn't require refrigeration- making it convenient for travel, work, and outdoor activities, storing it in a refrigerator extends the potency.