can you give yourself a b12 injection How To + Benefits can you do vitamin b12

Cell (2011) 144(5):64674

B12 injections are the standard NHS treatment for proven vitamin B12 deficiency, not a routine wellness boost

However, when very high oral doses are taken, approximately 1% can be absorbed through passive diffusion, independent of intrinsic factor, which explains how mega-doses can still raise serum levels

Approximately 50-98% of the injected cyanocobalamin is in the urine, mostly excreted within the first eight hours

Kraus D, et al

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