<<Disclaimer: Verify this information before applying it to your situation.>> Hello. I've had a hankering to make myself some dolmades (Greek stuffed grape leaves), but am in a quandary. Since I don't know where to get fresh or frozen grape leaves in the New York City area, I have been peering at the jars of preserved grape leaves in the ethnic markets here. All of the brands I have looked at (5 or 6 so far!) contain either citric acid, or, in one case, sodium metabisulfite, which I have never heard of and have not found listed on any of the gluten-free lists. The labels tend not to have manufacturer phone numbers. I am trying to decide whether I should risk purchasing one that says "product of California" and has citric acid (US-made, I would hope?), or else one made in Turkey with the mysterious "sodium metabisulfite" in it. I figure that imported brands containing citric acid would be the worst risks.