They also include HIV, some medicines, strict vegetarian diets, and being an older adult, according to The Johns Hopkins University.
The NHS warns that it is important for vitamin B12 or folate deficiency anaemia to be diagnosed and treated as soon as possible, as though many of the symptoms improve with treatment, some problems caused by the condition can be irreversible if left untreated.
“The longer the condition goes untreated, the higher the chance of permanent damage,” the health body explains.
All types of anaemia, regardless of the cause, can lead to heart and lung complications as the heart struggles to pump oxygen to the vital organs. A lack of vitamin B12 can cause neurological problems, which affect your nervous system.