Fit, if you're looking for more info on Sweetners, check out the link I'll put below.
The site is authored by a Doctor Eric Walters, a specialist in sweetners. I'm not going to get into a big long discussion about Ethanol in Fruit and juices, or essential amino acids like Phenylalanine in Diet Coke, or supposed claims, having Aspartic Acid, Phenylalanine and Ethanol, from a combination of foods, prevents the so-called problem Aspartame gives you, from not having the three things, immediately loose in the gut.
I cannot say there is no possible way Aspartame can cause harm, as I can't, but I do believe Dr Walters is not some sort of Government stooge, who wants to make people believe what might not be the right thing. I believe he is an unbiased genuine specialist, but you can judge for yourself if you like.
http://sweetenerbook.com/DEW.html