I use it sometimes, but don't really use that much sweetener of any kind. Yes, it is carb free. The reason the powdered sweeteners have carbs is because of the filler they contain. At least that is what I have learned from others here. I do use Sugar Twin powdered sweetener in my cream cheese with some strawberry Kool Aid, and drink Diet Rite which has splenda, and an occasional Crystal lite which has nutra sweet, but just don't use much sweetener otherwise. My daughter uses the liquid saccharin in her tea and likes it okay.