Vitamin B12 Injection

ABOUT VITAMIN B12 The use of vitamin B12 will have a positive effect if you have been diagnosed with any of the following:

  • Anaemia / Pernicious anaemia / Lethargy / Feeling faint / Tiredness
  • It helps the body’s nerve and blood cells healthy

Please note the use of vitamin B12 does not exclude you from seeking medical advice for any of the symptoms listed. Your GP is best placed to provide you with the most effective treatment.

  • A Vitamin B12 injection has a positive effect against any of the listed vitamin B12-deficiency when administered regularly over a period of 3–6 months. It is recommended that you receive about six injections over a period of weeks to build up your body’s vitamin B12 store.
  • Your body’s vitamin B12 store can then last for several months. It’s normal to administer 3-monthly injections to replenish your vitamin B12 levels.
  • If your symptoms do return prior to the end of the 3-month period, then you might have to be given another injection sooner than planned. This is a rare occurrence. We may suggest some further bloods tests with your GP. This very much depends on your clinical symptoms.
  • If your diet is the reason for your lack of vitamin B12 (and it is not due to pernicious anaemia), then once you have been given your initial injections, your GP may follow up your treatment by integrating dietary supplements. Alternatively, twice-yearly injections may be suggested instead.
  • If you do have pernicious anaemia, then you will require vitamin B12 injections for the rest of your life. There are usually no side effects from these vitamin B12 injections.
  • To discuss a vitamin B12 deficiency, please contact your GP.

Other conditions relating to Vitamin B12 

  • Conditions affecting the stomach 

○ Some stomach conditions or stomach operations can prevent the absorption of enough vitamin B12.

  • Conditions affecting the intestines 

○ Some conditions that affect your intestines can also stop you from absorbing the necessary amount of vitamin B12. EG: Crohn’s disease

  • Medication 

○ Some types of medicine can lead to a reduction in the amount of vitamin B12 in your body.

  • Functional vitamin B12 deficiency 

○ Some people can experience problems related to a vitamin B12 deficiency, despite appearing to have normal levels of vitamin B12 in their blood.