Sometimes artificial sweeteners like nutrasweet can slow weight loss for some people. A naturopathic doctor once told me that some people's bodies react to some artificial sweeteners the same way they react to sugar, with an insulin response, and insulin causes your body to store and hold on to the fat. I think this is true for me, because historically I seem to lose quicker if I stay away from beverages with nutrasweet. You might have to just try it and see how your body reacts. I do allow myself to have some diet soda once in a while, but it's always caffeine free...it took me a long time to break the caffeine habit and I don't want to go back there