What is the glycemic index of Xtra?
We have not measured the glycemic index (GI) of Xtra. *Please see below for how GI is determined. The following info might be helpful: Xtra contains 3 grams sugar (all 3g are fruit based) An average apple contains approx 12-16g sugar Glycemic index of average apple: 31-38 Glycemic index of berries (the primary fruit source of Xtra): 32 *Glycemic index values are determined experimentally by feeding human test subjects a fixed portion of food (after an overnight fast), and subsequently extracting and measuring blood samples at specific intervals of time.