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Active Acidophilus – 20 supplement is a 2-strain probiotic blend of Lactobacillus acidophilus and Bifidus lactis offered in a unique shelf-stable capsule. Each vegetarian capsule contains at least 20 billion viable microorganisms (average per capsule based on testing of 2 lots at 12 months) intended to provide nutritive support for the establishment and maintenance of favorable intestinal flora.