What we know Vitamin K deficiency bleeding (VKDB) develops in a small number of newborns who do not have enough vitamin K to form blood clots
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In certain regions of the world, marginal or subclinical vitamin B 12 deficiency may be fairly common in other age groups as well, including children, premenopausal women, and pregnant women, primarily due to low intake of animal-source foods (reviewed in 5)
Its also worth noting that individuals may experience different symptoms or levels of improvement from B12 injections, depending on their health status and B12 levels before injection
[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
Unlike some vitamins, B12 can be stored in the liver for an extended period, sometimes taking years for a deficiency to manifest