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It is an essential nutrient, meaning that it cannot be synthesized by the body and must be obtained through diet or supplements
[41] : 973 Breast milk B 12 decreases over months of nursing in both well-nourished and vitamin-deficient mothers
Healthcare professionals, compounding pharmacists, laboratory researchers, and individuals sourcing bacteriostatic water for reconstitution and preparation use
Most commercial preparations contain 1000 mcg of vitamin B12 per mL, making it easy to figure out the dosage volume
Tornqvist, H
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