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For example, a 2019 study of over 9,000 adults found people with obesity had lower blood levels of vitamin B12 (8)
Fast Facts B12 injections can be more effective than pills in certain patients who have trouble absorbing vitamin B12
Patience and adherence to the prescribed injection schedule are essential for optimal outcomes
Your GP may arrange periodic blood tests to ensure B12 levels remain adequate, though clinical response is generally more important than specific blood values once treatment is established
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