10 surprising gluten-containing foods By Elisa Bosley | August 28, 2013 3/11 3. Worcestershire sauce Alas, this Caesar-salad-dressing staple often contains malt vinegar from barley. Look for versions, such as Lea & Perrins, that use distilled white vinegar instead of malt vinegar. 0 comment 38 Facebook LinkedIn Twitter Google + Pinterest Print