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Consult Your Healthcare Provider If you experience excessive tiredness or nerve problems, your healthcare provider can do a blood test to check vitamin B12 levels and also rule out other potential causes for your symptoms
Some people find that they prefer to have smaller quantities of B12 injected weekly or fortnightly, and others would rather take larger doses of B12 monthly
The good news is that they are usually short-lived and not serious
Adults usually get 1000 to 2500 mcg of vitamin B12 in each injection
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