why do you need to have b12 injections Did you know all the great health benefits a Vitamin B12 Vitamin shot - GlamourEyes
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Energy metabolism B12 is an essential cofactor in the conversion of food into usable cellular energy

Retrieved May 27, 2025, from Institute of Medicine

As people grow older, B12 doesn't get absorbed as easily

Many patients have successfully learnt to self-administer B 12 by intramuscular injection, which reduces both healthcare costs and burden on GP practices, and allows people who are B 12 deficient to optimise their treatment regimen
