500 mcg b12 injection Methycobal micrograms 10 ampoules Vitamin B12 Injection, 2 ml,

This shot contains cyanocobalamin or hydroxocobalamin, forms of vitamin B12

Prepared vials should remain refrigerated between 2-8C and protected from repeated temperature changes

In addition to limited absorption via the IF, the intake of high-dose supplements leads to passive diffusion, i.e., the vitamin can freely enter the bloodstream without IF binding and receptor uptake

Drug Metab Dispos 41:550553

This means that it is not possible to overdose on vitamin B12, and as far as we know there is no upper limit on the amount of B12 that can be taken safely by an otherwise healthy person

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