Blended into a fermented whole food foundation, NOW Probiotic Defense is a blend of "friendly" probiotic bacteria, including strains that have been clinically verified. Thirteen active bacterial strains are combined in NOW Probiotic Defense, which is designed to boost immune system and gastrointestinal health. This product also contains fructo-oligosaccharide (FOS) to support the growth of Bifidus and Acidophilus microorganisms in a healthy manner.

Approved for lacto-vegetarian diets. contains traces of dairy protein, perhaps.

DNA fingerprinting technology has been used to confirm the identity of the probiotic strains contained in this product.