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Published on Jan 22, 2013
Vitamin B12 deficiency can sneak up on you, and can lead to a myriad of diseases and disorders. Know the signs and symptoms. You could be deficient yet still test in the so-called range of "normal B12" on a blood test, especially if you have taken an oral B12 supplement of uncertain quality, or you have been under-treating the deficiency. Oral B12 supplements do not work for all patients; patients with digestive/absorption problems benefit from B12 injections, as do patients with nerve damage.