Definitely no barley, because barley is just as much a gluten containing grain as wheat. Barley, rye, wheat and other grains each have their own protein. For t

Definitely no barley, because barley is just as much a gluten containing grain as wheat. Barley, rye, wheat and other grains each have their own protein. For those they are hordein, secalin, and gliadin, and they are all considered gluten.