Healthaid acidophilus plus 4 billion capsules are formulated using special strains of probiotic cultures on a dairy free medium fructo oligosaccharides fos are added to help support the growth and proliferation of bacterial strains in the intestinal tract healthaid acidophilus plus 4 billion helps support a balanced intestinal flora to maintain good digestion and support healthy immune function helps improve absorption and assimilation of nutrients in the body promotes healthy