I agree with Leap - to many <man-made> chemicals in diet drinks. I drove a truck for 6 years and the only load I ever carried that had 5 hazardous material placards was the chemicals to make Coke-Cola and Mello-Yello.
I prefer to get my drugs the natural way - by grinding beans to a powder and then boiling them! :-)Then again...I don't like going to the Dr. for the same reason...they always want to give me drugs.
Forgive my soapbox rant - but I've had bad experiences with stuff the Dr.'s said was safe. Just don't trust anything made by a chemical Company.