how to self inject vitamin b12 Shots at Home: How, Where & Often Yourself Best Vitamin B12 Injection Sites:

We review your medical history to avoid risk for patients with bleeding disorders, neurological conditions, or allergies

It also may surprise you that medications can deplete your vitamin B12 levels Im looking at you, metformin (3)

with more progressive features including hypotension, bradycardia, tetany, drowsiness, respiratory depression and coma

No, you cannot overdose on B12 It is highly unlikely that someone could take too much B12, says Natalie Allen, RD, a clinical assistant professor of biomedical sciences at Missouri State University

Pernicious anemia: This is an autoimmune condition that interferes with B12 absorption