I am in favor of “truth in labeling” too. While you want to keep the wheat out of cornbread, I want to keep the corn out of everything. I am VERY allergic to corn, and as far as I can tell corn is in almost everything sold in the supermarket that has 3 or more ingredients. It will be corn starch corn flour, corn oil, or high fructos corn syrup. also sweeterner dextros and moltos are made from corn and maltodextrin is a flavor enhancer, and it makes my throat close up. Very scary when that happens.
Have you tried to pin down the exact chemical that's causing you the problem?