It’s also important for vitamin B12 deficiency to be diagnosed and treated as soon as possible.
“Although many of the symptoms improve with treatment, some problems caused by the condition can be irreversible if left untreated,” warns the NHS.
What foods contain B12?
Vitamin B12 is found naturally in a wide variety of animal foods and is added to some fortified foods.
“Plant foods have no vitamin B12 unless they are fortified,” explains the National Institutes of Health (NIH).