what size needle is used for b12 injections a Injection: A Simple Guide How to self-inject intramuscular vitamin

You may also feel tired and weak, have weight loss, a lack of appetite, and even a sore tongue or mouth too

The ability to shuttle between the +1, +2, and +3 oxidation states is responsible for the versatile chemistry of vitamin B 12 , allowing it to serve as a donor of deoxyadenosyl radical (radical alkyl source) and as a methyl cation equivalent (electrophilic alkyl source)

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[1] Without intrinsic factor, dietary B12 cannot be absorbed effectively, leading to deficiency regardless of dietary intake

They are commonly used for B12 injections in areas like the deltoid or gluteal muscles