It isn't just sugar, it's all the simple carbs that get turned into sugar, such as breads, pasta, rice, cereals, potato chips, popcorn, milk, rice milk, etc once digested.

Whole grain bread and pasta's don't have enough fiber to really change their glycemic index, even whole grain bread has a worse glycemic index than Coke.

It's no wonder that they expect that 60% of all Americans will be obese by 2030. Insulin, it's a helluva of thing.