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
8 August 2021
If you have a vitamin B12 deficiency, a doctor may prescribe B12 injections every other day for 2 weeks until your symptoms improve
These immune cells, including lymphocytes, play a critical role in defending your body against harmful bacteria and viruses
In a randomized, placebo-controlled intervention study with more than 900 older participants experiencing psychological distress, daily supplementation with folic acid (400 g) and vitamin B 12 (100 g) for two years did not reduce the occurrence of symptoms of depression despite significantly improving blood folate, vitamin B 12 , and homocysteine levels compared to placebo (109)