<P> Like wheat, barley, and their hybrids and derivatives, rye contains gluten, which makes it an unsuitable grain for consumption by people with gluten - related disorders, such as celiac disease, non-celiac gluten sensitivity, and wheat allergy, among others . Nevertheless, some wheat allergy patients can tolerate rye or barley . </P> <P> Ergotism is an illness that can result from eating rye and other grains infected by ergot fungi (which produce LSD - 25 - like toxins in infected products). Although it is no longer a common illness because of modern food safety efforts, it was common before the 20th century, and it can still happen today if food safety vigilance breaks down . </P>

Where is rye grown in the united states