Pure Powder NutraFlora FOS is a pleasant-tasting, concentrated source of fructooligosaccharides (FOS), a non-digestible carbohydrate which aids the growth of beneficial intestinal bacteria such as bifidus and acidophilus. As a dietary supplement, begin with 1/2 teaspoon daily added to water or juice. Gradually increase quantity up to 2 teaspoons per day as desired. For maintenance use, consume 1/2 teaspoon. 6 Acidophilus and Digest Platinum.