[ad_1] The Schilling test is a four-step medical test used to diagnose pernicious anemia by determining if a patient has a vitamin B12 deficiency. The test involves administering vitamin B12 and radioactive B12, antibiotics, and pancreatic enzymes. Pernicious anemia can cause fatigue, depression, nausea, heartburn, weight loss, low blood pressure, muscle weakness, shortness of breath, […]