The following list of good and bad grains is taken from a number of sources on the internet and elsewhere. Some may not be suitable for beer brewing. This is where the fun comes in. Grains and seeds generally accepted at gluten-free. As always, some gluten sensitive persons may find some of these ingredients indigestible.
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.