Avoid most of the instant drinks which are processed with or have additives, stabilizers, or emulsifiers added. Only a few root beers allowed. Omit all instant coffees, instant tea, instant cocoa mixes, Postum, Ovaltine, malted milk, commercial chocolate milk which may have cereal added, and ground coffees which contain grain and some root beers. Soups Homemade broth and with allowed ingredients. Most canned soups and soup mixes - especially bouillon in powder, cubes, or canned form.
Some margarine have flour as an additive.
Start with Fleischmann's. Check out vegetable oils for additives. Check out margarine for possible offenders before using. Look for salad dressings that contain gluten-free stabilizers, colorings or dyes and canola. Vinegars Use apple cider and wine vinegars.