I have had that pain on but a handful of occasions in the over six hundred B12 monthly injections given since 1972
In research communities, these peptides are often discussed as complementary rather than directly competitive because: GHK-Cu is often chosen for collagen, skin, scar, and cosmetic tissue remodeling goals BPC-157 is often chosen for tendon, ligament, joint, muscle, and deeper recovery goals For that reason, many researchers discussing GHK-Cu vs BPC-157 eventually decide the better question is not which one is better, but which one better matches the tissue target? If you are building a broader research setup, you may also want to browse our research peptide collection for compatible inventory planning
[3] The British Society for Haematology guidelines emphasise that the response to treatment should be monitored through clinical assessment and blood count testing, rather than routine measurement of B12 levels after treatment has started
Clinical assessments using electroretinography showed improved retinal electrical responses in treated patients, indicating enhanced photoreceptor function and preserved neural signal transmission