This dairy and soy-free formula provides 10 billion CFU of the beneficial bacteria Lactobacillus acidophilus, Lactobacillus rhamnosus, Bifidobacterium longum, Bifidobacterium bifidum and Bifidobacterium lactis. L. acidophilus and B. longum have been shown to promote healthy cytokine production in the colon and maintain healthy G.I. barrier function, in part by supporting the mucosal lining of the G.I. tract. Several trials have also revealed that mixed probiotic supplementation helps maintain intestinal flora, support healthy yeast balance, and promote G.I. comfort. A study involving elderly individuals indicated that a mixture of lactobacilli and bifidobacteria maintained healthy gut ecology. Studies also suggest that probiotics support immune health, enhancing B cell, T cell and NK cell function.