The most chemically complex of all the vitamins, methylcobalamin is a water-soluble, organometallic compound with a trivalent cobalt ion bound inside a corrin ring which, although similar to the porphyrin ring found in heme, chlorophyll, and cytochrome, has two of the pyrrole rings directly bonded
He D, Cui W, Pang X, Dong J, Qiu Q, Dong H, et al
Dosing and administration The standard clinical protocol calls for 2mg administered subcutaneously once daily, typically in the abdominal region with injection sites rotated regularly
doi:10.1089/ars.2010.3397 Park J, Lee S, Lee S, Kang SW (2014) 2-Cys peroxiredoxins: emerging hubs determining redox dependency of mammalian signaling networks