According to Plumbs Veterinary Handbook, a common recommended dose for injectable cyanocobalamin for treating B12 deficiency is 25mcg/kg
Sale is limited to laboratory research applications
[21] Within cells, cyanocobalamin is converted to methylcobalamin and 5- deoxyadenosylcobalamin, coenzymes that participate respectively in homocysteine remethylation to methionine and in the isomerization of methylmalonyl-CoA to succinyl CoA, reactions essential for DNA synthesis, erythropoiesis, and myelin maintenance
Journal of molecular endocrinology , 25 (3), 287-298
The body uses methyl B12 as a co-factor to convert homocysteine back into methionine
doi:10.1016/j.tem.2017.02.004 (PMID 28291578) Roberti A, Fernndez AF, Fraga MF