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.
Healthy Eating. A gluten free diet is a diet that is completely free of any materials that contain gluten, which is found in grains like wheat, spelt, barley, rye and kamut. Gluten is also sometimes used as a food additive to add flavor or to thicken food.