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Evidence-based : Ensuring clinicians understand the difference between serum B12 levels and clinically active B12 stores, and other suitable tests to determine deficiency as well as symptom resolution with sufficiently frequent treatment
CDC summarizes that guidance directly in its injection safety recommendations: "Once a multi-dose vial is opened (e.g., needle-punctured) the vial should be dated and discarded within 28 days unless the manufacturer states another date for that opened vial
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If so, youre not alone
Vitamin B12 (also called cobalamin) is a water-soluble vitamin your body relies on to make energy, protect your nerves, and produce healthy blood cells
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