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Vitamin B-12 (cobalamin) is essential for the creation of DNA, the molecules inside cells that carry genetic information, and the metabolism of cells

Phase Loading (intensive) Dose 100-200 mg Frequency Daily for 7-10 days Notes Higher side-effect potential

[107] Chemistry [edit] Vitamin B 12 is the most chemically complex of all the vitamins

Some nutrients (glucose, amino acids) transported via carrier proteins

Unlike many other vitamins, B12 is stored in the liver in substantial quantities, meaning deficiency typically develops gradually over months to years as these reserves become depleted

Benzyl alcohol has been linked to a fatal "gasping syndrome" in newborns, so only preservative-free sterile water for injection should be used in that group