I have some of the Crystal Light (aspartame sweetened) powder to mix w/psyllium husk powder. But then I decided I didn't like chugging down the Crystal Light/psyllium husks. I threw out the psyllium husk powder and now I have all this Crystal Light on hand which I will not end up using because I really try to avoid aspartame sweetened products (carbs or no carbs). It sometimes causes people to stall, OTOH, some people don't like the taste of Splenda and prefer aspartame. It's really not encouraged on Atkins, but my belief is YMMV.