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are vit b12 injections safe Best Vitamin Injection Site: Administering B12 Shots Benefits of B-12 Shots |
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Evidence Summary: What the Studies Show Human clinical trials: Kuceki et al

MTHFR, methylenetetrahydrofolate reductase

ive used it for 4 weeks now and the difference is major

Lessons in biology from patients with inborn errors of vitamin B12 metabolism
