With over 30 years experience, American Health is the largest American-owned prime manufacturer of quality vitamins and food supplements. American Health's Acidophilus liquid is comprised of hardy, viable cultures of specially selected strains of lactobacillus cultures. This product contains three strains of Lactobacillus acidophilus including the original Metchnikoff strain, a special strain of Lactobacillus bulgaricus and a strain of Lactobacillus thermophilus. Each serving provides approximately 20 billion friendly organisms to support a favorable environment for the absorption of nutrients and the healthy functioning of the intestinal system.