Gluten concerns arise when wheat, barley and oat products are being used such as in our ORAC Energy greens and Protein & Greens. The wheat and barley juice powders used in our product are harvested from young grasses before the gluten containing endosperms develop and are considered by the suppliers to be gluten free. However there is always a chance for some gluten with these ingredients and growers do not want to guarantee otherwise. We have recently sent product out for gluten testing and we came in with a result of 23ppm and in order to make a gluten FREE claim you have to be under 20ppm. It really also depends if a person is highly allergic to gluten or just has a gluten sensitivity, in which the later would not have any reaction to such a small level, but we would not recommend the use of any wheat and barley grass for celiac as the risk factor is to great.