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While B-12 is available in various forms, injections are recommended for optimal absorption

During unusual circumstances, such as the COVID-19 pandemic, the approach to managing chronic conditions like pernicious anaemia, which requires regular B12 injections, had to be adapted, potentially influencing the perception of efficacy and safety of the treatment among patients

The benefits claimedreversal of aging, improved cognition, enhanced metabolismremain unproven in controlled human trials

Expert Opinion on Biological Therapy 12(1):37-51

It often appears alongside other nutritional symptoms

Concurrent use of medications that affect b12 absorption Several common medications interfere with b12 absorption through various mechanisms