how much is a dose of b12 injection Vitamin for Adults: 7 Dosage Facts Vitamin B12 Dosages: Your GoodRx

[9] When suspected, diagnosis is made by blood tests initially a complete blood count, and occasionally, bone marrow tests

Intramuscular (IM) : Common sites include the upper arm (deltoid muscle), thigh (vastus lateralis), or buttocks (gluteus medius)

The Journal of Emergency Medicine

if you don't have one, a sturdy plastic jug with a screw-on lid (an empty laundry detergent bottle is the classic example) will do in a pinch

Additionally, people with kidney or liver disease, iron or folic acid deficiencies or bone marrow-affecting conditions should consult their doctor before using B12 injections[18]

However, it has received generally recognised as safe (GRAS) status for its intended use in foods, conditional on the publication of pre-existing safety data [6]