21st Century Acidophilus Probiotic Blend 150 CapsulesA proprietary blend of the most beneficial known strain of Lactobacillus acidophilus, synergistically combined with three other genetically distinct probiotic organisms and the prebiotic Fructooligosaccharide (FOS), is designed to aid in the maintenance of probiotic activity in the intestine. Billions of Organisms guaranteed at time of manufacture Proprietary Blend Designed to Maintain Healthy Intestinal Flora No Added Sugar, Salt, Artificial Flavors,