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The absence of human trials means safety is uncharacterised
Improve the function of focus and concentration with the cognitive enhancement effect of B12 injections
Imagine the injection site as a tiny wound
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doi:10.1038/nrendo.2013.78
However, if you have severe kidney problems, consult with a healthcare professional before proceeding with B12 injections, as excess vitamin levels might not be easily eliminated from your body
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