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Generally: A normal level of vitamin B12 in your bloodstream is 160-950 picograms per milliliter (pg/mL)
How many B12 injections will I need
Pan Afr Med J
Many labs use controlled-temperature storage and minimize repeated temperature cycling
Patients with a severe needle phobia, tremors, poor eyesight, or cognitive impairment should have a partner, family member, or healthcare provider administer the injection instead
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