A healthcare professional may recommend blood tests to check vitamin B12 levels, blood count, folate, iron, and other markers depending on symptoms. Sometimes additional tests are needed to understand why the deficiency happened.
NICE explains that vitamin B12 deficiency can be hard to spot because symptoms are common in other conditions, and treatment may involve B12 tablets or injections depending on the cause and severity.
Do not rely only on symptoms or online lists. Testing helps confirm whether B12 deficiency is actually present.
Food Sources of Vitamin B12
Vitamin B12 is naturally found mainly in animal-based foods. Good sources include:
