Celiac disease: Celiac disease is a medically diagnosed autoimmune digestive disease, which interferes with absorption of nutrients from food and can lead to malnourishment and other conditions. Even a very small amount of gluten contamination can cause an autoimmune reaction including both digestive and non-digestive symptoms, typically appearing a few hours or days after gluten has been ingested.
Gluten sensitivity: According to the National Foundation for Celiac Awareness (NFCA), the condition affects 18 million Americans and falls within the spectrum of gluten-related disorders. Symptoms of gluten sensitivity often overlap with celiac disease. Unlike celiac disease, gluten sensitivity is not an autoimmune disease and does not result in the same type of intestinal damage.