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Laboratory Testing Before starting Vitamin B12 injections, laboratory testing is often recommended to determine your baseline B12 levels and to monitor your progress

May 26 2020;10(6)doi:10.3390/brainsci10060322 Fernstrom JD

A cross-sectional study

nausea 57% (4.5 mg), vomiting 28%, diarrhea 22% Discontinuation Rate: 18% (4.5 mg) vs
