administering vitamin b12 shots b12 injection sites How to Perform a Subcutaneous of How to Inject Vitamin B12
Description
It takes 4-6 weeks for full effects

If you experience severe pain, signs of infection (redness, warmth, swelling), or an allergic reaction (rash, itching, difficulty breathing), seek medical attention immediately

Foufelle, F

doi: 10.1001/jamadermatol.2020.3385