Fuente: WIPO "tomato" Compositions and methods for dietary fiber materials containing a plurality of distinct dietary fiber materials derived from distinct plant materials. At least some of the dietary fiber materials comprise fiber-bound polyphenols. Advantageously, the materials presented herein increase, upon oral administration, short chain fatty acid concentration, microbial biodiversity, and/or microbial abundance in the gut of the subject, even when compared to administration of a weight-equivalent dosage of inulin or psyllium.