Ingedients in American beers

I’m trying to find out what is the ingredient that makes me sick in the American beers. I can drink imported beers, but what ever it is has caused me to have a medical condition. If I could find out then maybe I can eliminate this in my diet completely. I"m thinking its a preservative or… something

Reported

Why? She seems like a perfectly respectable, though horsey ;), person and the question seems innocent enough.

It’s a duplicate OP.

Oh, that’s different. Carry on!

Closed as a duplicate thread.