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A doctor may recommend vitamin B12 shots for people at risk of a deficiency or its complications, particularly if they are unable to take oral supplements

Vitamin injections are fast, effective, and ideal for people with deficiencies, poor absorption, or specific wellness goals

Recommend 100% Great multivitamin shot

no issues w medication or the injection

Civil Engineering, UCLA Last updated: June 2026 Human-researched and AI-assisted with full editorial review

The most common B12 subcutaneous injection sites are the following: The upper arm To self-administer a B12 injection into the arm, pinch a thick skin layer of the side or back of the upper arm and insert the needle at a right angle