I had a uncle bens sweet and sour cooking sauce last night and after a couple of hours started to experience my usual 'I've been glutened' symptoms. Checked the label, it contained vinegar but didnt say which kind. Googled it and there seemed to be a lot of conflicting advice. The sauce is listed as gf on coeliac website. If it's not that, I don't know what caused the symptoms as everything else was def gf. Any thoughts ?