Who can benefit from vitamin B12 injections
Vitamin B12 injections are genuinely valuable for people who cannot absorb B12 or who are clearly deficient. They are not a general energy treatment, and it is worth being honest about the difference.
Who benefits most
People with pernicious anaemia, who lack the protein needed to absorb B12 from food, and who need lifelong injections.
People after stomach or bowel surgery, those with coeliac or Crohn's disease, long-term users of certain medicines, and long-term vegans with low levels.
Symptoms that make testing worthwhile
Persistent tiredness, pins and needles, a sore tongue, poor balance, low mood or difficulty concentrating.
These are not specific to B12, which is exactly why testing first matters.
Why we test before injecting
Injecting B12 without confirming deficiency can mask other causes of the same symptoms, including thyroid disease and iron deficiency.
A blood test costs little and makes any treatment far more meaningful.
What a course looks like
Treatment often starts with loading doses, then moves to maintenance injections every eight to twelve weeks depending on the cause and your response.
We keep a record of each dose and schedule the next before you leave.
In short
If you are tired and wondering about B12, start with a blood test rather than an injection.
This article is general information and does not replace individual clinical advice. If you have symptoms that concern you, speak to our team, your GP or call 111.