Methanol from aspartame
The myth that aspartame is a poison is propagated by some on the basis that, as aspartame is broken down in digestion, a small amount of methanol is produced as a metabolite. Of course, large quantities of methanol are toxic but, as with everything, it is the dose that counts. In fact, although aspartame is ten percent methanol the sweetener is a very small source of methanol when considered alongside the methanol we ingest from the rest of our diet, including from fruit and vegetables and their juices - pectin containing fruits produce most of the methanol we consume daily.
Tomato juice, for example, contains around six times as much methanol as the equivalent volume of an aspartame-sweetened soft drink. The body treats methanol from aspartame in exactly the same as methanol from other dietary sources. Methanol is in fact produced by the body during normal metabolism, and excreted including on the breath.