Friendly bacteria at research-backed levels, designed for every day use and containing enough 'billions' to make a difference. As our flagship product, For Adults - 25 Billion, contains our Lab4 friendly bacteria blend and has been used by thousands of people for more than a decade to support their digestive and immune health. The product also contains calcium to support digestive health, vitamins C & D, selenium and zinc, which all support immunity and prebiotic FOS fibre, which acts as food for the friendly bacteria.