FOS Powder Fructooligosaccharides (FOS) are short-chain polymers comprised of D-fructose and D-glucose, which are not metabolized by the body like simple sugars are, and are therefore considered non-digestible oligosaccharides. They occur naturally in bananas, garlic, Jerusalem artichokes and certain other foods, and technically are a soluble fiber (ARG FOS are derived from chicory root). FOS are effective sweeteners, being half as sweet as sucrose, yet are not absorbed and have minimal caloric value.
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