1: https://pubmed.ncbi.nlm.nih.gov/2708042/ 2: https://headachejournal.onlinelibrary.wiley.com/doi/pdfdirec...
I never really knew what to make of it, and always wondered if there was a connection with PKU disorder.
Most of what I'm finding about the association also lists alcohol as a much bigger trigger, which I hear (unsurprisingly, I guess) less anecdotally among migraine-suffering friends of mine.
http://www.medscape.com/viewarticle/579335 (http://whilesciencesleeps.com/pdf/328.pdf)
If this is the actual mechanism, it would suggest that those people should avoid formaldehyde-containing foods in general, like apples, bananas, grapes, onions, carrots, seafood, beef, and poultry.
There is a massive difference between "Aspartame causes migraines" and "Aspartame causes migraines for me"
It's possible aspartame is bad for migraines. Given that migraines are really bad, then you might as well avoid aspartame, it's not like you're losing much compared to the potential gain.
But what's very bad is to talk like we know for sure. Maybe cheese causes migraines, maybe alcohol causes migraines, maybe not enough cheese causes migraines. Maybe we'll think something completely different a few years from now, because collecting good information is just incredibly hard.
The truth is medical science hasn't figured it out yet. It's okay to try things and see if it works for you, but do it with care and humility. There's no secret knowledge being censored here. But overconfidence ends up doing more harm than good, so we should be more careful than that.
Sunlight, artificial light, weird smells, etc etc