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It must come from food sources like meat, fish, eggs, and dairy, or from supplementation
At 2 mL, one vial yields twenty 500 mcg doses
In the UK, adults with confirmed B12 deficiency and neurological symptoms typically receive hydroxocobalamin injections1 mg intramuscularly on alternate days until symptoms stabilise, followed by maintenance doses every two months
Neither approach is universally better. Oral zinc is appropriate for many individuals
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