Barley and rye are also out, for me, unfortunately: I tested that hypothesis. However, Omission beer (made with barley, then treated with an enzyme to remove the gluten) is A-OK.
At this point in my life, I’m a human self-testing guinea pig. I have not gone so far, though, as to eat pure gluten (yup, you can buy it). Not willing to put myself through that rigorous of a test, particularly since it might mean I miss a week of work.
