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Dietary sources of Vitamin B12 include meat, fish, eggs, and dairy

Because the intranasal forms have lower absorption than the IM dosage form, intranasal B12 forms are administered once weekly

Graber MD Updated: October 22nd 2022 Main Source of Information: Empower Overview of Methylcobalamin (B12) Injection General Information Methylcobalamin, or vitamin B12, is a B-vitamin

How long the injection lasts depends on several factors: How severe the deficiency is A persons age and how fast their body processes things Problems with digestion or absorbing nutrients Daily habits or activity levels How often does the body use B12 inside its cells People with pernicious anemia or ongoing deficiency often get weekly shots, while others do fine with a monthly injection

Biological Product A virus, therapeutic serum, toxin, antitoxin, vaccine, blood, blood component or derivative, allergenic product, protein (except any chemically synthesized polypeptide), or analogous product, or arsphenamine or derivative of arsphenamine (or any other trivalent organic arsenic compound), applicable to the prevention, treatment, or cure of a disease or condition of human beings