Unlike some vitamins, B12 can be stored in the liver for an extended period, sometimes taking years for a deficiency to manifest
[Crossref] Andrs E, Kaltenbach G, Noel E, Noblet-Dick M, Perrin AE, et al
B12 deficiency is more common than widely recognized, particularly in individuals who follow plant-based diets, take proton pump inhibitors or metformin, are over 50, or have gastrointestinal conditions affecting absorption
This is likely due to the role of vitamin B12 in energy production and metabolism
Peptide therapies should only be administered under the supervision of a licensed medical provider
Pollard, B