Glucose responses elicited by consumption of test, control and
reference food were expressed as incremental area under glycemia
vs time (0–120 min) curve (IAUC mmol min/l), calculated geometrically (Brouns et al., 2005). Incremental Area Under the Curve
(IAUC) is the area over the baseline under the curve of glycemia vs
time, ignoring area beneath the curve. The baseline is glycemia
value in time 0. GI value for each subject was calculated by
expressing each subject’s IAUC after the test food as a percentage
of the same subject’s mean reference IAUC (three tests for reference food). The mean GI value for the test and control food was calculated from all available data for all subjects. The GL of each
sample was calculated using the following equation