needle size for intramuscular b12 injection Choosing wisely: length and gauge considerations and subcutaneous injections b12 injections portsmouth Here's How

Higher doses and the injectable forms require a prescription

Hydroxocobalamin is the standard UK preparation, administered intramuscularly for conditions like pernicious anaemia and gastrointestinal malabsorption B12 acts as a cofactor in DNA synthesis, red blood cell formation, and nervous system function, supporting energy metabolism pathways Common side effects include injection site reactions, mild gastrointestinal upset, and temporary urine discolouration, with serious reactions being rare NHS access requires GP assessment with blood tests

Ahmed MA, Muntingh G, Rheeder P

There was a small marginally significant decrease in RBC selenium, and a possibly significant very small increase in WB selenium