Statistical Analysis Subject characteristics will be expressed as the mean (SD). 13C-glucose oxidation as 13CO2 will be the primary outcome measured, as this best describes the whole body oxidation capacity for glucose. Area under the curve (AUC) for each subject's 13CO2 oxidation from t0 to t240, the time to reach maximum 13CO2 oxidation (tmax) and the maximum peak enrichment in13CO2 oxidation (Cmax) will be calculated for UCCS and Glycosade®. The values obtained from the carbohydrate sources will be compared by using a two-tailed paired t-test. Significance will be set at P<0.05.