I recently treated a patient who had a history of headaches for 40 years. I did some blood work and found that she was gluten sensitive. I took her off of gluten and her headaches went away. She then visited with her gastroenterologist who picked up the phone and called me and said “Why did you put this patient on a gluten free diet? She doesn’t have celiac disease.” I began to explain about something called non-celiac gluten sensitivity and I have to admit there was a lot of silence on the other end of the phone. There are still a lot of people that don’t believe that there really is such a thing as being gluten sensitive if you don’t have celiac disease. Let’s look at what the science is really telling us about this notion of non-celiac gluten sensitivity.