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B12 plays a foundational role in red blood cell formation, neurological function, and energy metabolism
A complete kit includes: A sealed vial or glass ampoule of B12 (cyanocobalamin or methylcobalamin) A 3 mL syringe A drawing needle (typically 18-21 gauge) An injecting needle: 22-25 gauge, 1 to 1.5 inch for intramuscular (IM)
This guide walks you through everything you need: who should self-inject, the supplies you'll gather, the four safest injection sites, a detailed step-by-step procedure, aftercare, side effects to watch for, and an FAQ that answers the questions patients ask us most often at ThinWorks
In deficiency treatment, this injection might be given daily or every other day for a short period
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