I am gluten sensitive and have to choose supplements that are labeled gluten free. I purchased this product because of its being "gluten free" and after taking it, had a terrible gluten reaction. I again took it a few days later to make sure it wasn't something else I had ingested with hidden gluten, and again I had the same allergic reaction. I read the label and it states that it has barley grass. There is a lot of debate as to whether those with gluten sensitivities can ingest barley grass or not. I can not so beware if you have a gluten allergy!