Diet Soda Linked to Premature Birth

“Aspartame breaks down into methanol and other substances in the body, which can in turn be converted to toxic substances such as formaldehyde and formic acid, the researchers explain. And studies in non-human primates have linked even very low exposure to methanol to shortened pregnancy and labor complications.”

http://www.reuters.com/article/idUSTRE66M4AF20100723