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Though there have been no side effects documented from vitamin B12 use from either supplementation or food consumption, you should always check with your doctor prior to beginning supplementation of any type
Dosage of B12 injections Injections may be given every month until B12 levels have returned to normal
Diagnosis of an underlying absorption disorder, significant anaemia or neurological disease may require GP or specialist investigation
These changes were not observed in placebo-treated patients
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