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Values range from about 8 to 30 minutes after intravenous or intramuscular dosing
Bacteriostatic Water contains 0.9% benzyl alcohol preservative enabling multi-use vial access over up to 28 days and Sterile Water for Injection contains no preservative and must be used immediately upon vial entry or discarded
Cyanocobalamin contains a cyanide molecule instead of a methyl group, making it inactive and potentially harmful
[18] Lactation studies demonstrate that maternal injections modestly elevate breast-milk B12 concentrations without adverse infant outcomes, supporting compatibility with breastfeeding while underscoring the need for maternal repletion to prevent neonatal deficiency
[16] [18] How should the injection be stored
Endurance athletes face unique challenges that may increase B12 needs: prolonged training sessions stress the digestive system, potentially impairing absorption, while increased red blood cell turnover demands consistent B12 availability
