Does the artificial sweetener aspartame cause cancer?
According to WhileScienceSleeps:
The methanol contained in the diet soda produced in many countries of the world is dangerous. It comes from the artificial sweetener Aspartame. There is no safe level of consumption of methanol as there are with other less poisonous substances that can occasionally find their way into our foods.
Methanol is particularly dangerous to humans, more so than any other animal. When humans consume low doses of methanol it is metabolized directly into formaldehyde which is a cancer producing agent of the same level of danger as asbestos and plutonium. This conversion does not all happen in the Liver, a common misconception, but also in the brain and a woman’s breast. It is my belief that diet soda has contributed to the rise of breast cancer and multiple sclerosis that has been preceded by the use of Aspartame as a food ingredient in every country that has allowed its use.
I've heard this from other sources I cannot locate right now. What's the truth?