It contains aspartame.
Aspartame has been the subject of a vigorous public controversy regarding its safety and the circumstances around its approval. It is well-known that aspartame contains the naturally-occurring amino acid phenylalanine, which is a health hazard to the few people born with phenylketonuria, a genetic inability to process phenylalanine.
A few studies have also recommended further investigation into possible connections between aspartame and diseases such as brain tumors, brain lesions, and lymphoma, but no large-scale studies have been conducted.
These possibilities, combined with notable conflicts of interest in the approval process, have engendered vocal activism regarding the legitimate risks of aspartame, as well as some less credible theories. Taken from a website.
