There are millions of bacteria inside each person, forming an internal world inside us which is often referred to as The Microbiome'. There is a lot of research ongoing at the moment about the impact the microbiome may have on the rest of the body. Natures Aid Probiotic Complex provides 2 billion live organisms of Lactobacillus Acidophilus and Bifidobacteria Bifidus. This product also provides 100mg FOS. FOS, or Fructooligosaccharides, is a natural fibre found in raw fruits and vegetables, which offers a natural source of what is often referred to as a prebiotic., , Directions for Use: Take 1-2 capsules per day with food. Do not exceed the recommended intake.