Vitamin B12 Deficiency: Causes, Symptoms, and Treatment

the B12 from the protein it’s attached to, as it does for food. But it does need to combine with intrinsic factor, a protein made by your stomach, to be absorbed into your body.

So, if your vitamin B12 deficiency is due to an autoimmune disease in which your stomach doesn’t make intrinsic factor, supplements might not work for you, and you will need continue reading …