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Retrieved 23 July 2018
For someone who is genuinely deficient, those risks are the more serious side of the equation
Methylcobalamin vs Cyanocobalamin You may see two forms of injectable B12 offered: methylcobalamin and cyanocobalamin
[20] It can also be injected intravenously for the purpose of treating cyanide poisoning, as the hydroxyl group is displaced by cyanide, creating a non-toxic cyanocobalamin that is excreted in urine
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