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.
Celiac disease is a condition that damages the lining of the small intestine when a person eats gluten found in wheat, barley, rye or some oats, preventing the intestine from absorbing necessary nutrients. A strict gluten-free diet is often prescribed for people with the disease.