Distilled Beverages And Vinegars
Most distilled alcoholic beverages and vinegars are gluten-free. These distilled products do not contain any harmful gluten peptides even if they are made from gluten-containing grains. Research indicates that the gluten peptide is too large to carry over in the distillation process, leaving the resulting liquid gluten-free.
However, some types of alcoholic beverages do contain an unsafe amount of gluten for people with celiac disease, and include those with added color or flavoring such as dessert wines, and those made from barley malt, such as bottled wine coolers. For these, consumers should check the label, and if in doubt, contact the company. Beers, ales, lagers, malt beverages and malt vinegars that are made from gluten-containing grains are not distilled and therefore are not gluten-free. There are several brands of gluten-free beers available in the United States and abroad.
Source: Celiac Disease Foundation