dosage of b12 injections for pernicious anemia CYANOCOBALAMIN INJECTION, USP 30000 mcg/30 mL (1000 mcg/mL) 30 mL VIAL Vitamin B12 for Injection Cyanocobalamin
Description
This is why supplementation is often recommended

Vitamin B 12 Is Associated with Higher Serum Testosterone Concentrations and Improved Androgenic Profiles Among Men with Infertility

This is despite some pretty compelling theoretical evidence like B12s role in hemoglobin formation, nucleic acid synthesis, and the methylation cycle that produces growth-supporting methionine
Available online: 33.Dorothy Crowfoot HodgkinThe Nobel Prize in Chemistry 1964