Vitamin B12 Deficiency: Causes, Symptoms, and Treatment

autoimmune diseases can make it harder for your body to absorb B12, including pernicious anemia. It’s when your body can’t make intrinsic factor, the protein needed to absorb B12. Another autoimmune disease, atrophic gastritis, thins the lining of your stomach and prevents your body from making enough hydrochloric acid and intrinsic factor you need continue reading …