<<Disclaimer: Verify this information before applying it to your situation.>> I just got back to NY from Florida and did a supermarket search. That's my latest way of getting my exercise. To be brief. There were 3 potential mustards that may be safe and one is the liquid Coleman's hot English mustard made in New Jersey as opposed to the dry Coleman's mustard imported from England. The ingredients listed included no form of vinegar and no wheat which I did find on the dry mustard label tonight as another list member noted. That wheat tag is a new thing, my old containers in the house do not have that on them. There are also 2 other potential mustards, I am going to call all 3 manufacturers tomorrow. Honeycup uniquely sharp mustard from Canada made by Stone Country contains cider vinegar and natural tocopherol which are the only potential problems. Old Cape Cod Sweet and Hot Honey Mustard only contains cider vinegar which could be a source of Gluten. I will keep everyone posted. If anyone knows about these products please let me know. Thaione in NY