Digestive health. Supports gastrointestinal & immune health. Acidophilus and bifidus are probiotics naturally found in a healthy intestinal tract. They provide beneficial bacteria needed for restoring and balancing intestinal flora in both the upper and lower gastrointestinal tracts. Our Dual Action Acidophilus & Bifidus capsules have a unique matrix that forms a gel at the surface, protecting the probiotic bacteria until they reach the small intestine where they are released in their full, biologically active state. Each capsule contains equal parts of acidophilus and bifidus, and contains one billion viable bacterial cells at time of manufacture. What's more, while this product doesn't require refrigeration - making it convenient for travel, work, and outdoor activities - storing it in a refrigerator before and after opening is recommended to maintain and extend potency.