why would i need a b12 injection Are Shots Safe? Royal Palm Beach Medical Group B12 Vitamin shot - GlamourEyes

Vitamin B12 is a water-soluble vitamin that plays a vital role in brain function and the production of DNA and red blood cells

However, markedly elevated levels without supplementation may warrant GP review to exclude underlying conditions such as haematological disorders, liver disease, or renal impairment

The Mayo Clinic indicates high doses of vitamin B-12, such as those used to treat a deficiency, might cause: Headache Nausea and vomiting Diarrhea Fatigue or weakness Tingling sensation in hands and feet Healthline says: In very rare cases, some people can experience side effects caused by allergic reactions or sensitivity In addition to helping athletes build muscle, vitamin B12 plays a role in maintaining nervous system function and brain health

doi:10.1038/nrdp.2017.40