We got Randy's mom to stop drinking Diet Coke a few years ago by giving her a copy of a full report of the problems caused by aspertame. His dad used to drink Diet Mountain Dew which has a lot of aspertame and it had his diabetes so screwed up he couldn't take enough insulin to get it under control. As soon as he took aspertame out of his diet the problem stopped and he is in much better health now.
I stopped using aspertame in America yrs and yrs ago,, and i started to buy stevia. Since I been in Norway, i've had a diet coke once, and couldn't drink it because it tasted like pure salt to me. Now i grow my own stevia, or i use brown sugar. even if your a diabetic you can still have some sugar, preferably not white sugar, but you have to watch because the foods you eat make sugar also,, so if you can do with out sugar all the better, use stevia if you absolutely have to have something sweetened. but thats just my opinion. Toni that happened to my mom, who was a severe diabetic. but with my mom it was the thinking that since there was no "sugar" in the food, she could eat it anytime she wanted,,,, she learned the hard way too. mess her insulin up so bad she had to take 3 shots a day for the rest of her life instead of the just the one pill.