B12 injections are most clearly indicated when: A person has confirmed B12 deficiency that requires rapid replacement Theres a known or likely absorption issue Theres a need for ongoing maintenance due to non-dietary causes (for example, autoimmune gastritis) Typical treatment schedules (UK guidance) Treatment schedules can vary depending on symptoms, severity, and cause
May-Jun 2016;82(3):269-74
If its not good enough for elite athletes who have full-time medical, dietetic, and pharmacology support its sure as hell not good for Average Jo
A B12 injection session typically lasts around 15 minutes, making it a convenient option for those with busy schedules
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