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Description
They are not intended for human consumption or for any therapeutic, diagnostic, or clinical use

doi: 10.1038/clpt.2010.57

While most people get enough B12 through diet, certain groups might benefit from B12 injections or supplements

(1;2) For those with deficiency, the dose of vitamin B12 required varies by severity
As such, having inadequate B12 levels can decrease normal red blood cell production, which can impair oxygen delivery ( Specifically, a deficiency in B12 can cause megaloblastic anemia
