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Patients who have early Leber's disease (hereditary optic nerve atrophy) have been found to suffer severe and swift optic atrophy when treated with vitamin B12

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[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

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Handling and Storage Supplied as a lyophilized powder