Natures Aid Acidophilus Complex contains 5 Billion Lactobacilli Bacteria. As research continues into the millions of bacteria that live in our bodies, we've created our Acidophilus Complex to help support the good bacteria that form your 'Microbiome'. This food supplement typically provides 5 billion live organisms of Lactobacillus acidophilus, Lactobacillus rhamnosus, and Lactobacillus casei in each fuss-free, easy-to-swallow vegetable capsule. Added to that, you can rest assured that our Acidophilus Complex capsules are completely dairy-free.