& Dick, T.P
(PubMed) Stone KL, Lui LY, Christen WG, et al
Methionine synthase, a vitamin B 12 -dependent enzyme, converts homocysteine to methionine, regenerating tetrahydrofolate (THF) from 5-methylTHF
Note on labeling: the events below come from r/peptides, r/PeptideTherapy, and peptide forums for subcutaneous research-peptide GHK-Cu use
Strict vegetarians and vegans, or people with conditions that prevent them from absorbing nutrients from food, are the most likely people to be deficient
Patients who transition from gastric banding to other bariatric procedures such as sleeve gastrectomy or Roux-en-Y gastric bypass should be aware that these carry a higher risk of B12 and other micronutrient deficiencies due to their malabsorptive components, and monitoring should be intensified accordingly