<<Disclaimer: Verify this information before applying it to your situation.>> This information may have appeared here before, but with all of the interest in vinegar here lately, I thought this information was worth posting. Heinz customer service has informed me that in all of their products which contain vinegar, the vinegar is made from corn. In fact they said they make the vinegar themselves, which is the same Heinz clear vinegar we find on the grocery store shelves. I received this information from them over the phone, so if any of you would like to confirm this information (recommended), please do so directly with Heinz. I have no interest in this company whatsoever, and am passing this on to my fellow Celiac list mates only as a courtesy. Bill in Delaware