I've got both the little bottle and the packets here. They're each very small servings of a particular kind of fructose that is intensely sweet and low-glycemic.

The 'granular' serving is 1/5th of a teaspoon and physically incapable of being more than 1 gram carbohydrate as it weighs about a gram and the packets are also about 1 gram. In that way, 1 serving (approx equal to 2 teaspoons' sugar sweetness) is the same as Splenda cuz Splenda has the dextrose filler. Dextrose however, is a lot more glycemic than the fructose. So in larger quantities, like when 'baking', the OptiSweet is probably the better, lower glycemic choice.

I like the stuff, but use a wide variety of sweeteners so as not to get overexposed to any of them. The only one I DON'T have, I think, is Equal (aspartame).