Consideration of the validity of glycemic index using blood glucose and insulin levels and breath hydrogen excretion in healthy subjects

Curves of elevation of blood glucose and insulin after the ingestion of glucose and test foods. All subjects ingested the solution (150mL) containing 50g of glucose within 1min, and ate test foods containing available carbohydrate with a glucose equivalent of 50g with 150mL of water within 5min. About 150μL of blood was collected from the fingertip using a heparinized capillary tube at 15, 30, 45, 60, 90, 120, 150 and 180min. (A) Four white rice cultivars, (B) three potato cultivars, and (C) three noodle brands, respectively. Values are expressed as mean±SD. A significant difference was found between values with same lowercase letters at each time point, at p<0.05 by Tukey’s test.