Gluten and recurrent apthous stomatitis:
A high rate of patients with recurrent apthous stomatitis and celiac disease respond well to treatment with a gluten-free diet. Patients with recurrent apthous stomatitis were found to have a higher rate of gluten sensitive bowel disease than the general population which supports screening these patients for celiac disease (15).
Gluten and depression:
Patients who self-reported non-celiac gluten sensitivity were given a short term challenge with 16 grams of gluten, 16 grams of whey protein, or placebo daily for 3 days. The subjects were tested for signs of depression with the Spielberger State Trait Personality Inventory (STPI) and found that gluten induced more feelings of depression compared to whey or placebo. (16)