title: In vitro starch digestion and cake quality: impact of the ratio of soluble and insoluble dietary fiber.
abstract: The influence of the ratio of soluble dietary fiber (SDF) and insoluble dietary fiber (IDF) on the in vitro starch digestion, predicted glycemic index (pGI), and the physicochemical properties of fiber-enriched cakes were evaluated. The hydration and pasting properties were affected by the ratio of SDF and IDF. According to the increase of IDF ratio (SDF ratio reduction) in 3 g fiber-enriched cakes, slowly digestible starch (SDS) contents increased, while the rapidly digestible starch (RDS) contents decreased. The pGI values were significantly different with control in 3 g fiber-enriched cake containing more than 50% IDF contents (p<0.05). But the pGI values of 6g fiber-enriched cake samples were not significantly different by SDF and IDF ratio. With the exception of the SDF 100% cake, volume index, hardness, and color values of the fiber-enriched cakes increased according to reductions in the SDF ratio. The cakes containing 3 g of total dietary fiber (the same ratio of SDF and IDF) per serving were shown to have low pGI and acceptable quality attributes. Specially, total dietary fiber amount and IDF ratio are more effective than SDF ratio to lower the pGI value.
authors.affiliation: Department of Food and Nutrition, Hanyang University, 17 Haengdang-dong, Seongdong-gu, Seoul 133-791, Republic of Korea.
authors.forename: Im Kyung
authors.initials: IK
authors.lastname: Oh
authors.affiliation: Department of Oriental Medicine Fermentation, Far East University, Chungbuk 369-700, Republic of Korea.
authors.forename: In Young
authors.initials: IY
authors.lastname: Bae
authors.affiliation: Department of Food and Nutrition, Hanyang University, 17 Haengdang-dong, Seongdong-gu, Seoul 133-791, Republic of Korea. Electronic address: hyeonlee@hanyang.ac.kr.
authors.forename: Hyeon Gyu
authors.initials: HG
authors.lastname: Lee
mesh_terms: D004043:Dietary Fiber; D004063:Digestion; D038321:Glycemic Index; D006801:Humans; D012995:Solubility; D013213:Starch / Q000737:chemistry / Q000502:physiology*
chemical_list: D004043:Dietary Fiber; D013213:Starch
keywords: Insoluble dietary fiber; Physicochemical property; Soluble dietary fiber; Starch digestion