Caution is advisable. For a detailed description of each grain, malting specifics, each grain's contribution to the brewing process, including flavor and aroma, photographs and more, see the Gluten Free Brewing Grains page . Amaranth Buckwheat Corn Flax Maize Millet Quinoa Ragi Rape Rice Sesame Sunflower Sorghum Soybean Teff Wild Rice Grains to stay away from when brewing gluten-free beer. Recent studies indicate that oats may be acceptable for some non-gluten diets, but I include it in the 'no' list. This would make a nice addition to the 'yes' list.
More study is needed.
I could see the next problem coming a mile away, but until this point I refused to acknowledge it. The grains that must be used to brew a non-gluten beer are not available in a malted form, for the most part. Some are not even available in raw form. This dilemma prompted my next education, procuring and malting non-gluten grains. I am lucky to live in the Midwestern United States, so raw grains are cheap and fairly plentiful.