Study of Blood Glucose Suppression by Kentoh-Rakucha Containing Indigestible Dextrin after Loading with Sucrose Solution

An 8 g portion of the granular health food Kentoh-Rakucha (test sample name: CD-1), consisting of 89% indigestible dextrin, 6% Coix seed (Coix lacrima-jobi L. var. ma-yuen Stapf), and 5% horsetail (Equisetum arvense L.), which contains indigestible dextrin in the form of soluble dietary fiber, was suspended in 200 mL of water and administered to test subjects, who were then given 150 mL of a 71.2 g sucrose solution. The 20 healthy volunteers who received 150 mL of the sucrose solution about six minutes after administration of the test food (CD-1) were examined for blood glucose level in comparison with 20 matched volunteers who received a placebo food (not containing indigestible dextrin) before loading with the same sucrose solution. Blood glucose levels in the CD-1 group and the placebo group peaked at 30 minutes after loading with the sucrose solution. Blood glucose level and AUC were effectively suppressed in the CD-1 group in comparison with the placebo group. There was however no correlation between blood glucose and the insulin levels induced by the indigestible dextrin. The product was thus effective in the suppression of rapid increase in blood glucose level and glucose AUC after ingestion of a starchand sugar-rich meal.