Abstract
Dietary therapy with dietary fiber is useful for human obesity and diabetic patients, since it induces delaying glucose absorption and preventing postprandial hyperglycemia. The purpose of this study is to investigate whether two types of dietary fibers（beet pulp; soluble fiber＋insoluble fiber; cellulose; insoluble fiber）affect postprandial blood glucose metabolism parameter in healthy dogs. We used a commercial food as control diet（control diet; low fiber: 0.9g/100kcal）. Furthermore, 10％and 20％of beet pulp and cellulose were added to the control diet, respectively, as supplemented dietary fiber. The total additive dietary fiber amount was 10％（fiber: 3.5g/100kcal）and 20％（fiber: 6.1g/100kcal）respectively. When comparing amount of dietary fiber, 20％supplemented diet induced decreased postprandial blood insulin concentrations,non-esterified free fatty acid（NEFA）concentration and GIP concentration as compared to control diet. Furthermore, 20％supplemented diet induced increased postprandial blood GLP-1 concentration as compared to control diet. Therefore, 20％supplemented diet might help delaying digestion and absorption,thereby preventing obesity and suppressing appetite. However, no significant difference was observed in postprandial blood parameter when the two fiber sources（beet pulp and cellulose）were taken into account. Since beet pulp was mainly composed of insoluble fiber（about 80％）, the characteristics of the soluble fiber might be lacked.
