Look I'm not trying to gaslight you. It's totally possible that aspartame affects you in a unique way. Maybe the headache thing is real and you are a hyper-responder. Maybe most people don't experience headaches because they're convinced it's safe. All I have to say is that you can't rule out psychosomatic effects without blind testing, and I personally don't believe untested anecdotes like yours because of my own experience with drugs and from growing up in the tail end of the MSG panic. Have a nice day, take the last word if you want.