b12 injections daily mail Vitamin Injections: Good or Bad? B12 Injections - Maryland Plastic
Description
The Office of Dietary Supplements at the National Institutes of Health recommends that adults get 2.4 mcg of vitamin B12 daily

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Vitamin B12 Deficiency and the Nervous System: Beyond Metabolic DecompensationComparing Biological Models and Gaining New Insights into Molecular and Cellular Mechanisms

So it's worth asking if their intake of B12 could be an influence
