I called the company. The young guy said he couldn't give me a list of all the non- regulated stuff. It's secret. But what was I concerned with? I said "wheat". He said, " wheat?". I said I have an allergy. That was all he needed to hear. He took a few minutes to read all the ingredients and the source of an ingredient if relevant. He said that it had no wheat.
I would think that approach would work for most companies.
Hopefully so. I've had good luck with the few companies I called, as well. Kind of funny that I had better luck with companies in construction, when dealing with food allergies, than with some of the food companies I've called.