http://www.wikihow.com/Homebrew-Gluten-Free-Sorghum-Beer People who have celiac disease must avoid foods and beverages that contain gluten. Gluten occurs naturally in barley, wheat, and rye. Beer is usually a beverage that must be avoided by people with celiac disease, as it is almost always made from barley. Wheat beers are made from barley and wheat. However, gluten-free beer can be made relatively easily from sorghum syrup.