can b12 injections cause cancer Understanding Vitamin Deficiency in Patients Pernicious Anemia: Definition, Symptoms, Causes

The difference between vial and pen storage primarily relates to air exposure: vials with unused doses can be re-capped and re-refrigerated between uses, while pens are single-use devices that must be discarded once opened, even if medication remains

I am not a chemist but B12 does seem to be an inherently stable molecule, not least indicated by the fact that the boxes of it have long shelf from production dates on them

[DOI] [PubMed] [Google Scholar] 26.Hann MM, Keseru GM

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For legitimate laboratories, it is generally available under research use only terms

This helps to hide the veins and bones that become visible with age