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 contains selected bacteria Lactobacillus acidophilus, Lactobacillus rhamnosus and Lactobacillus casei. providing a total of 5 billion live bacteria in every easy to swallow capsule. As with all Natures Aid bacteria supplements, the bacteria selected for this formulation have been shown to effectively survive the digestive tract and colonise the microbiome.