This dairy & soy-free formula provides 10 billion CFU of Lactobacillus acidophilus, Lactobacillus rhamnosus, Bifidobacterium longum, Bifidobacterium bifidum and Bifidobacterium lactis. Research indicates that these strains may have particular health promoting properties for gastrointestinal (GI) and immune health. L. acidophilus and B. longum have been shown to promote healthy cytokine production in the colon and maintain healthy GI barrier function, in part by supporting the mucosal lining of the GI tract. Several trials have also revealed that mixed probiotic supplementation helps maintain intestinal flora, and promote GI comfort. A study involving elderly individuals indicated that lactobacilli maintained healthy gut ecology. Studies also suggest that probiotics support immune health, enhancing B cell, T cell and NK cell function.