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.
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Vitamin B12 or folate deficiency anaemia can cause a wide range of symptoms, including extreme tiredness, a sore red tongue and muscle weakness.
Causes of vitamin B12 or folate deficiency anaemia include a problem with your immune system and a lack of vitamins in your diet.
The main treatments for vitamin B12 and folate deficiency anaemia are vitamin injections or tablets.
Vitamin B12 or folate deficiency anaemia is where your body makes abnormally large red blood cells that cannot function properly.
Page last reviewed: 23/05/2019
Next review due: 23/05/2022