The mechanisms of action are entirely different, and the compounds work on separate biological systems
Vitamin B12 plays a key role in energy production, brain function, and red blood cell support
We close with the strongest case in the whole space: heavy lifting for bone density (the LIFTMOR trial), the pelvic-floor evidence, your three biggest fears answered, and how to tell a good coach or clinician from a bad one
Cell Metabolism, 2019 doi:10.1016/j.cmet.2018.12.008
Regenerative and protective actions of the GHK-Cu peptide in light of the new gene data
While these are population-level numbers, the principle applies to individuals as well: routine injection visits for non-deficient patients add up in copays, travel time, and appointment scheduling without delivering additional benefit