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Brain and Nerve Health: B12 keeps your brain and nerves healthy

Deficiency can occur due to dietary limitations, digestive disorders, or certain medications that interfere with B12 absorption

You can get pernicious anemia if: You have an autoimmune disease that makes your immune system attack the cells in your stomach that produce intrinsic factor, a protein that helps your body absorb B12

THF plays an important role in DNA synthesis, so reduced availability of THF results in ineffective production of cells with rapid turnover, in particular red blood cells, and also intestinal wall cells which are responsible for absorption