Read labels carefully, look for the allergen warnings at the end.
My GS is on a GFCF diet. It helps with his Asperger's. I sure hope it helps you feel better and hurt less.
I was surprised to learn that barley and rye were no no's on GF.
Cheating is an option. . . . Cheaters never win and winners never cheat, but smart knitters who want to retain an iota of sanity do, cheerfully. ~~Kory Stamper