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Serious adverse events have not been widely reported, but this may reflect the relatively small number of people who have used the compound and the limited reporting mechanisms available
Hypokalaemia cyanocobalamin B12 injections are contraindicated in patients with Lebers disease, a rare hereditary optic neuropathy
Another concept is to measure B12 bound to the plasma protein transcobalamin (holoTC, active B12) before and after administration of three high physiological doses of B12 for two days
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If your body is unable to absorb and store vitamin B12, your healthcare professional may prescribe frequent injections, which can vary from weekly shots to one every four weeks
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