I am a hypoglycemic, and can't even deal with Splenda. However, stevia works just fine for me without upsetting my blood sugar at all. It really does have to be dilute, and I've had bad luck with certain brands as being more bitter. I prefer the purified Stevia Extract from Now. I use just the end of a teaspoon handle to scoop up what is probably 1/32 of a teaspoon to sweeten a whole pot of tea. I find that this brand dissolves more readily, and doesn't have any added starches or other carbs.