The syringe-unit amount changes based on how much bacteriostatic water is added to the vial
No Self-Injection Unless Trained: Injections should be done correctly to avoid injection site irritation or infection
However, in view of the excellent safety profile of B12, even at high doses, supplementation, ideally as part of a more comprehensive nutritional programme, may still be of value when the clinical picture and/or other factors (e.g
The main reason that a doctor would prescribe vitamin B12 injections is if the patient is unable to obtain enough vitamin B12 on their own, whether they have pernicious anemia or are unable to get enough of the vitamin through their diet alone
Supplementary Table S3)
[15] [16] Tests may include full blood count, serum B12 levels, anti-intrinsic factor antibodies (to diagnose pernicious anaemia), and sometimes methylmalonic acid or homocysteine levels when the diagnosis is uncertain