You get headaches from eating tomatoes, shrimp, milk, cheese, eggs, corn etc?
Mase, I remember back a couple of decades ago, the MSG barrage, my mother read something, sorry, I can't quote you, but it said MSG was made from or derived from papaya enzyme, is this accurate? Does my memory serve me, MSG is more or less a food product rather than created chemical something-or-other in a lab?
Glutamate can be made and it occurs naturally. It's what gives a tomato flavor. Glutamate is also produced by your body and you couldn't function without it. Like with anything, if you consume too much of it bad things can happen. People die from drinking too much water.