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If you suspect you have experienced side effects from a prescribed B12 medicine, you can report this through the MHRA Yellow Card scheme
However, do not stop prescribed B12 injections or tablets for confirmed deficiency conditions such as pernicious anaemia without consulting your GP, as this could lead to serious health consequences
For most people with a vitamin B12 deficiency, oral supplements are an effective way to bring your levels up to normal, says Foxx, and research backs this up (2)
What is vitamin B12 therapy
Philp D, et al
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