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Anaemia, vitamin B12 or folate deficiency

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Introduction
Vitamin B12 or folate deficiency anaemia occurs when a lack of vitamin B12 or folate causes the body to produce abnormally large red blood cells.
Symptoms of vitamin B12 or folate anaemia
Vitamin B12 or folate deficiency anaemia can cause a wide range of symptoms. These usually develop gradually at first, and can worsen if the condition goes untreated.
Causes of vitamin B12 or folate deficiency anaemia
Vitamin B12 or folate deficiency anaemia occurs when a lack of either of these vitamins affects the body’s ability to produce fully functioning red blood cells.
Diagnosing vitamin B12 or folate deficiency anaemia
A diagnosis of vitamin B12 or folate deficiency anaemia can often be made by your GP based on your symptoms and the results of blood tests.
Treating vitamin B12 or folate deficiency anaemia
The treatment for vitamin B12 or folate deficiency anaemia will depend on what is causing the condition.
Complications of vitamin B12 or folate deficiency anaemia
As most cases of vitamin B12 deficiency or folate deficiency can be easily and effectively treated, complications are rare.
See what the doctor sees with Map of Medicine
See what your doctor sees, find out what is happening with your Vitamin B12 or folate deficiency anaemia treatment and what the next steps might be.