The glycemic index is useful, but it can be very misleading because it only tells you how quickly the sugar in the food gets absorbed into the bloodstream; it doesn't reflect how much sugar is in the food item itself. For example carrots are higher on the glycemic index than white bread is, but you'd have to eat something like a pound and a half of carrots to get the same insulin response as eating one slice of white bread. That's why researchers developed the concept of glycemic load, which takes into account how much sugar a food contains.
There seem to be a number of glycemic indices, with sometimes wildly different values. Here's one from the Harvard School of Public Health that provides glycemic index and glycemic load for 100 foods:
http://www.health.harvard.edu/newswe..._100_foods.htm
There's a paper here (with more tables) that talks about why different glycemic indexes vary:
http://www.ajcn.org/content/76/1/5.full



Reply With Quote
