We enhanced the colonic fermentation of an HGI amylopectin breakfast meal by
adding lactulose, a soluble disaccharide that boosts colonic fermentation but that, because it is nonviscous, should not affect the GI of the food to which is added.
In particular, the SME of a completely and rapidly digestible breakfast containing amylopectin starch with or without
added the fermentable disaccharide
lactulose was compared with that of a slowly digestible breakfast meal containing high - amylose starch, in which, besides being slowly digested, some of the starch would escape small - intestine digestion and be fermented in the colon.