ntury Acidophilus Probiotic Blend is a proprietary blend of the most beneficial known strain of Lactobacillus Acidophilus, synergistically combined with three other genetically distinct probiotic organisms and prebiotic Fructooligosaccharide (FOS), is designed to aid in the maintenance of probiotic activity in the intestine. Supports digestive health | Maintain healthy intestinal flora | Contains over 1 billion probiotics at time of manufacture | Gluten Free