Get regular screenings.
Experts recommend that all adults with celiac disease get annual blood screenings for ferritin (a measure of the amount of iron stored in the body), folate, vitamin B12, and thyroid-stimulating hormone (TSH, a measure of how well the thyroid is working). In addition, you will probably be tested for calcium absorption, which is measured by a test called a 24-hour urine catch. This test is exactly what it sounds like — you urinate into a special container every time you use the bathroom during a 24-hour test period. Together, these tests will allow you and your doctor to track how well your intestines have healed.