title: Relationship between dietary fiber content and composition in foods and the glycemic index.
abstract: The dietary fiber content and composition of 25 foods were related to their glycemic index (GI) to see whether the individual components of dietary fiber, specifically soluble fiber, would provide a better predictive capability of the glycemic response than their total dietary fiber content. Total dietary fiber was significantly related to GI (r = 0.461, p less than 0.05). Soluble fiber was not significantly related to GI (r = 0.308), and uronic acids in insoluble fiber were most closely related to GI (r = 0.584, p less than 0.01). Multiple-regression analysis showed that more variation of GI was explained by uronic acids in insoluble fiber (34%) than by total dietary fiber alone (21%, p = 0.05). The combination of pentoses, hexoses, and uronic acids in soluble and insoluble fiber explained only 50% of GI variability. In determining the potential metabolic effects of diet, physiologic assessment of foods is a useful supplement to chemical analysis of their dietary fiber content and composition.
authors: Department of Nutritional Sciences, Faculty of Medicine, University of Toronto.
authors: T M
authors: TM
authors: Wolever
mesh_terms: D001682:Biological Availability; D001786:Blood Glucose / Q000032:analysis*; D002241:Carbohydrates / Q000032:analysis; D002482:Cellulose / Q000032:analysis; D004043:Dietary Fiber / Q000032:analysis* / Q000378:metabolism; D005504:Food Analysis; D006801:Humans; D006943:Hyperglycemia / Q000378:metabolism; D007003:Hypoglycemia / Q000378:metabolism; D007328:Insulin / Q000032:analysis*; D012044:Regression Analysis; D012995:Solubility; D014574:Uronic Acids / Q000032:analysis
chemical_list: D001786:Blood Glucose; D002241:Carbohydrates; D004043:Dietary Fiber; D007328:Insulin; D014574:Uronic Acids; D002482:Cellulose