There are foods that are already and clearly on my no fly list, since my sensitivity is dramatic and swift.

Aspartame: I want to say all artificial sweeteners, but that doesn't make sense--it's probably just that I dislike Splenda. I avoid them mostly anyway because of the slippery mouth feel and unpleasant aftertaste, but now I even avoid most chewing gum, since ten minutes of chewing can start the pain.

Nitrites: This is another one I discovered by myself. Suddenly pepperoni pizzas were no longer palatable. I studiously avoid all sausage with nitrites in them, and limit my bacon intake--it's good that I live in a large enough market that I can find breakfast meats light on the preservatives.

Mint: Not always, but sometimes. And when it does, it sends me over hard. Often it's mint and sweet, which is why I don't chew gum anymore, and why I've switched to weirdo toothpaste.

These are the biggies--the ones where I still have the taste in my mouth when the pain sets in. They are the easy ones, since I don't miss them. Feeling them trigger pain makes them no longer tasty. I have some misty technical sadness at the loss of pepperoni, but I can't look at a slice of the pizza with hunger anymore.

The next part of the investigation will be much more complicated.