Wow, sorry you had to go through that! Having to go to the ER sucks.

Have you considered outside (not dietary) elements that are new in your environment, or where you have travelled? The only time I got an allergic reaction severe enough to have to go to the ER was on a day when I visited a cactus nursery, followed by visit to a gym. Was it one of the cacti? Something I came in contact with on a surface in the gym? I never did determine what it was, but it was definitely environmental.

Maybe it's not your diet at all that's causing your reactions.

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