bruising with b12 injections Bruised injection site methylcobalamin : r/B12_Deficiency How to self-inject intramuscular vitamin
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Best for selected goals

Dr said to my daughter just to go out and buy tablets
However, this is not usually done in practice

Zhenyuan Wang: Data curation, Methodology, Resources
Gender may affect serum vitamin B12 concentrations, although results have been inconsistent
