The good bacteria in probiotics can help maintain intestinal flora and promote G.I. comfort. This 5-strain blend probiotic provides 10 billion CFU (colony forming units) of Lactobacillus acidophilus, Lactobacillus rhamnosus, Bifidobacterium longum, Bifidobacterium bifidum and Bifidobacterium lactis. Research indicates that these strains may provide support for G.I. and immune health.‡