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b12 injections pain in arm How to self-inject intramuscular vitamin - Overview Vitamin B12 Injections: Hot Shots?
Description
As a key player in the bodys metabolic processes, B12 helps convert food into energy, which is why it's often linked to reduced fatigue and enhanced vitality

However, call your doctor if the soreness worsens or lasts more than 2-3 days

Manufactured by: HIKMA FARMACUTICA (PORTUGAL), S.A
Side effects may include: Some mild stinging or discomfort at the spot where the needle was inserted, which usually is short-lived

doi: 10.1001/jama.250.14.1886
