How common are gluten sensitivity, gluten intolerance, and celiac disease?

Many organizations say the prevalence of celiac disease is anywhere between 1 in 100 to 1 in 300 (one of the more commonly cited studies estimates 1 in every 133 people has celiac disease), though the total number of people reacting to gluten is much higher when you include the incidences of gluten sensitivities and intolerances. Dr. Kenneth Fine, a renowned gastroenterologist, is finding that the number of those with gluten sensitivity might be greater than 1 in 3 people. Regardless of your diagnosis and where on the spectrum you may fall, however, going gluten-free can infuse your life with more energy, a reduced incidence of gastro-intestinal and joint pain, and more clear-headed thinking.