Reviews describe regenerative and protective actions, roles in skin regeneration, and modulation of multiple cellular pathways but this is largely mechanistic and preclinical work, not large human efficacy trials
Many people go years without detecting their B12 deficiencies, which can have devastating health consequences
Peptides function by signaling and regulating biological processes, whereas steroids act through hormone pathways that influence metabolism, inflammation, and muscle growth
In the US, it is not FDA approved for human use
American College of Obstetricians and Gynecologists 5
So if a healthy person stops taking in vitamin B12, it often takes a few years before the body runs out of it and develops symptoms of vitamin B12 deficiency