951 aspartme is the culprit with the bad side effects in diet coke, pepsi max, etc. I used to drink it all day every day (Like 6-8 cans) and get really bad headaches, stomach cramps, etc. I still have it but have cut down to 1-2 cans a day. I am now drinking water even though I hate water.
I have also heard about the sacchrin(sp) causing cravings.
I really need to wean right off it eventually I think.