Well as I posted recently, you should look up a Dr Eric Walters. He has a very good site about sweetners, as he uis a Biochemist, with 20+ years reserach into them.
He claims that Aspartame is safe enough to ingest.
look at it this way.
2 Ingredients.
Methanol.
Phenylalaine
Aspartic Acid.
Two of those are Amino Acids, Phenylalanine being an essential one, I beleive a Neurotransmitter for cell regeneration and growth. I think it acts as a relayer or stimulator of electrical signals from the Brain.
Unless people have Phenylketonuria, a conditon present from birth for some, Phenylalanine should be fine, unless someone consumed massive amounts, then maybe an issue could occur.
Methanol is also present in things like Oranges and the Juice.
So think of it. If someone had a Bowl Of Cereal and Fruit Juice for breakfast regularly, they would ingest all three from Cereal and Milk protein, and Orange Juice Methanol, in fact I think Oranges may contain more Methanol than a can of DC, but don't quote me on that.
The only argument against so called Aspartame side effects, not happening in this instance, is the Amino Acids and Methanol are free in the Aspartame, whereas the Breakfast example I gave, would require breakdown of the ingredients and I suppose smaller levels of all three things, converging together at any one time.
Frankly this so-called explanation, is something I cannot buy in to.
I did see a list once, (can't recall where), of so-called Aspartame side effects, and almost all I saw, bar one, I knew could be linked to other stuff, like too much Salt, Fat, Sugar, Mineral and Vitamin deficiencies, toxicity or competition, and possible other things. Not exclusively if possible at all, to Aspartame
I cannot say it is 100% safe and cannot say it is never able to harm, but I do believe it's more scapegoated than it should be.
Incidentally, what Dr Walters has to say, might make for an interesting counter argument, and I would urge people to read it, if not least to see the other side of the coin, which I doubt is touted much.
Dr Walter's Site