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In both studies, the mode of supplementation was via injection, which tends to involve high doses of vitamin B12, although precise dosages were not specified
The at home kit comes with literally everything you need
Many of these home kits only measure total B12, and not other markers in your blood, such as methylmalonic acid or homocysteine, which are better signs of deficiency, Ren says
PubMed Seiwerth, S., Rucman, R., Turkovic, B., Sever, M., Klicek, R., Radic, B., Drmic, D., Stupnisek, M., Misic, M., Vuletic, L.B., Sikiric, P
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