Article: The big four gluten culprits are wheat, rye, barley, and triticale. Avoid these in all cases, whether you are only gluten-intolerant or have celiac.  Wheat to avoid includes kamut and spelt. Because wheat often goes by another name, here are varieties of wheat to also definitely avoid:  Bulgur Durum flour Farina Graham flour Kamut Semolina   Rye contains a protein called secalin, which is a form of gluten.  Triticale, a cross between rye and wheat, is actually a hybrid designed in laboratories in the late 19th century.  Barley is the last big gluten cereal to avoid. It is commonly made into meals and used in alcohol production, among others. White oats themselves do not contain gluten, they are often cross-contaminated with wheat because both are commonly processed in the same facilities. Avoid eating oats and oatmeal unless the packaging specifically designates the product as gluten-free. In theory, the distillation process removes all gluten proteins if done properly, even if the alcohol was manufactured using a glutinous grain (such as wheat, barley, or rye).  You can safely drink alcohols such as vodka manufactured from wheat, but be wary of beer. Look for beer that is specifically designated gluten-free. In theory, the distillation process removes all glutinous proteins. But in reality, cross-contamination may occur. Not only this, but some distillers may add mash to alcohols after distillation as a filler. This may cast doubt on alcohol's ability to deliver truly safe results. If you really want to be careful, stick with potato-based vodkas, tequilas and mescals, or rums. These all contain non-gluten grain sources, so they should be fine to drink. Checking labels is important. While many of the following kinds of foods have been and are being made gluten-free, many of them aren't. It's better to be safe than sorry. Avoid:  Breads, croutons, cereals, and crackers Cookies, cakes, and candies Imitation meat, imitation seafood, processed lunch meats, and "self-basting" poultry Salad dressings, gravies, sauces (such as soy sauce), and vegetables in sauces Pastas and "seasoned" rice mixes Soups, matzo, and processed snacks like chips (potato chips and tortilla chips)

What is a summary?
Always avoid the big four. Watch out for oats and oatmeal. Enjoy distilled alcohols but avoid beers unless they are specifically gluten-free. Avoid the following foods unless labels specify they are gluten-free.