These are literature-context observations not clinical safety verdicts
The absence of verified pharmacokinetics and product verification prevents evidence-based recommendations regarding discontinuation timing, perioperative safety, and postoperative resumption, leaving surgeons unable to quantify risk in elective operative settings
Avoid Unverified Sources Risks: Buying from unverified vendors may result in receiving counterfeit or contaminated products
Numerous studies have shown that all four vitamin B12 forms are converted to the same intermediate form in the cells and during this process, ligands of the specific supplemented vitamin B12 form cyano, hydroxy, adenosyl or methyl are removed (Obeid et al., 2015
Yu ZY, Chen DW, Tan CR, Zeng GH, He CY, Wang J, et al