Nourishes Friendly Bacteria* Very Low Glycemic Index* Inulin, a fructooligosaccharide (FOS), is a soluble prebiotic fiber that is resistant to digestion and reaches the large intestine essentially intact. * Intestinal probiotic bacteria consume inulin and in turn, produce the ...Nourishes Friendly Bacteria* Very Low Glycemic Index* Inulin, a fructooligosaccharide (FOS), is a soluble prebiotic fiber that is resistant to digestion and reaches the large intestine essentially intact. * Intestinal probiotic bacteria consume inulin and in turn, produce the short-chain fatty acids that nourish the cells lining the colon.