The US National Academy of Medicine updated estimated average requirements (EARs) and recommended dietary allowances (RDAs) for vitamin B 12 in 1998
In practice a GP or nurse may administer off-licence by giving a sub-cutaneous (under the skin, SC) injection but it is important to remember that the GP makes their own decision and takes their own accountability and reliability if they go off-licence
I got it on a whim at an IV clinic
European Journal of Clinical Nutrition , 68 (5), 541548
A Variety of Equine Injections Our collection of horse injections includes: Vaccinations: Protect your horse from common equine diseases and infections with reliable vaccines tailored for equine health

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