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.
A gluten-free diet is called a gluten-free diet because the grains that must be avoided all contain a protein called gluten. Most people who follow a gluten-free diet have celiac disease, a serious genetically-based autoimmune disease. gluten-free diet does not include the grains wheat, barley, rye, or hybrids of these grains.