Instead, it exists as a research compound, which means its quality, purity, and concentration can vary significantly between suppliers
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Food and Drug Administration for safety, effectiveness, or quality
In general, the normal range for vitamin B12 is around 200 to 900 picograms per milliliter (pg/ml)
Vitamin B12 (Cobalamin) : Keeps nerves healthy, helps make red blood cells, and converts food into energy
This keeps dosing calculations consistent regardless of vial size