b12 injections sore arm Where Can You Inject Where is the best place to inject a B12 shot? B12 & MIC B12 Injections

Summary of the findings The current article evaluated 13 studies, of which eight were randomized clinical trials comparing different administration routes of vitamin B12 in patients with vitamin B12 deficiency

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Antioxidants (Basel) 9 , 759 (2020)

Why most people get enough vitamin B12 from diet alone The RDA for vitamin B12 is so small that it's measured in thousandths of a milligram, which is expressed as either mcg or ug (a millionth of a gram)

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That is the evidence gap, stated plainly: the mechanism is well-motivated and the preclinical signal is consistent, but no human study has confirmed that any of it translates to people, at any dose, by any route