Vitamin B12, also known as cobalamin, is an important nutrient responsible for various bodily functions, including energy production, nerve cell health, and red blood cell formation. Normal levels of Vitamin B12 typically range from 200 to 900 picograms per milliliter (pg/mL) or 150 to 665 picomoles per liter (pmol/L). Levels below 200 pg/mL (150 pmol/L) generally indicate a deficiency that may require treatment.
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