I'm still trying to figure it out. I suffer from severe acid reflux, and I've narrowed down the culprit to bread products. When I gave them up for a while a lot of other symptoms that I hadn't associated with the reflux also went away - my asthma improved and random joint pains I've been getting for years just stopped.

I've decided I'm going to go completely grain-free for a week and then do some experimenting with different stuff to see what happens. Standard wheat is obviously a problem, but I'm not sure about wheat-related grains like spelt or duram yet.

So far I seem to be fine with corn.

I picked up some potato flour as well yesterday. So I have a few things to try out.