glutathione in plants plants: an integrated overview - NOCTOR - 2012 - Plant, Cell & Environment Afepasa
Description
Unlike many other vitamins, B12 is stored in the liver in substantial quantities, meaning deficiency typically develops gradually over months to years as these reserves become depleted

It allows the glutathione to be delivered directly to your cells, where it is needed most

Flack JE., 3rd Deaton D

[6] Devathasan G, Teo WL, Mylvaganam A

Vitamin B12 is not produced by the body but is an essential part of cell reproduction, blood formation, and protein synthesis
