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If you do opt for a self-test, make sure you check for the following: Check the test covers 'active B12' (the amount available for your body to use) rather than 'total B12' levels Check the blood testing laboratories used to test them are accredited by UKAS
A healthcare provider can determine deficiency through blood tests
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User-Friendly Tips for Taking Vitamin B12 Injections Taking Vitamin B12 injections can be a straightforward process
Mayo Foundation for Medical Education and Research
