The varieties of language you use in different areas of your life are known as speaking or writing styles. Some particularly specialized styles, such as those used in the courtroom, or poetry, or the operating room, are known as registers.
The United States National Institutes of Health recommends testing vitamin A levels in people with celiac disease at diagnosis. This is because vitamin A deficiency is common in celiac disease. Deficiency can result from incomplete digestion, absorption, or metabolism. Normal absorption of vitamin A first requires digestion, or releasing, from food protein in the stomach.
1 People with celiac disease cannot digest gluten, which is present in wheat, rye, barley, and possibly oats. 2  Foods containing gluten are toxic to these people, and their immune system responds by damaging the small intestine. 3  A blood test can determine whether celiac disease is present.