how to give yourself an injection of b12 a Vitamin /B12 Injection? #vitaminboost #vitamin #mindfulgut How To Self-Inject B12

Not having enough can cause tiredness, brain issues, and big red blood cells

Immune system reinforcement

Last clinically reviewed: 31 July 2026 Clinical information sources NICE NG239 Vitamin B12 deficiency in over 16s: diagnosis and management NHS Vitamin B12 or folate deficiency anaemia NHS Diagnosis NHS Treatment MHRA Vitamin B12 and cobalt allergy advice This page provides general information about the pharmacy service and does not replace personalised advice from a pharmacist, GP or other healthcare professional

Rare but serious side effects include allergic reactions

A test to check for the ideal 'acid to base' ratio to minimize irritation caused by the injection itself