Nitrogen is a chemical element with symbol N and atomic number 7. It was first discovered and isolated by Scottish physician Daniel Rutherford in 1772.
âA gluten-free diet is a diet that does not include gluten, a protein found in wheat, rye, and barley,â says Tricia Thompson, RD, a dietitian based in Manchester, Mass., who focuses on developing gluten-free eating programs for people with celiac disease.
Most people who follow a gluten-free diet do so because they're using it to treat a specific health condition. The best-known health condition that responds to a gluten-free diet is celiac disease. In fact, the diet was first developed to treat celiac, which is caused by an autoimmune reaction to the gluten protein. Specifically, when those with celiac disease consume wheat, barley, or rye, the gluten in the grain triggers the immune system to attack the lining of the small intestine.