swelling after b12 injection Feeling worse Injection: Answering concerns What Does a B12 Shot

If youre dangerously low on this vitamin, an injection allows us to administer a more controlled dose to help return you to normal levels

The vitamin injection is typically administered intramuscularly (IM)

It plays a role in: Red blood cell formation: B12 is needed to produce healthy red blood cells, which carry oxygen throughout your body

The primary role of this vitamin is to support the nervous system and to make red blood cells

Hydroxocobalamin or methylcobalamin are preferred alternatives in such cases

Likewise, autoimmune conditions that affect the stomach lining, such as atrophic gastritis or pernicious anemia, directly impact intrinsic factora protein essential for B12 absorption