injectable vitamin b12 is considered a dietary supplement Compounded Hydroxocobalamin (Vitamin B12) Injection 250 mL and 500 mL vials Provides 1 Vitamin B12: the essential nutrient
Description
those potentially deficient in the micronutrient (holo-TC 271 nmol/L with holo-TC being very low or low (Herrmann and Obeid, 2008)

When you take B12 orally, it has to survive your digestive system, and only a fraction of it may actually reach your bloodstream

For research applications, investigators should consider several important factors when designing studies with 5-amino-1MQ

That said, individuals with an MTHFR gene mutation confirmed by a blood test may benefit from methylated forms like methylcobalamin, which their bodies may process more effectively
