It is not destroyed independent animal model work continues, and the HGF/c-Met mechanism has been corroborated by other labs but the specific dramatic synaptogenesis claims that made dihexa famous (the "7x BDNF" numbers) trace back to papers now under formal expressions of concern by the journals that published them
Structural Comparison GHK-Cu is structurally simpler three amino acids (glycine, histidine, lysine) bound to a copper(II) ion
Chien KL, Lee BC, Hsu HC, Lin HJ, Chen MF, Lee YT
Yet decades later, researchers still do not have a clear understanding of how DSIP may work, whether it has a meaningful physiological role in humans, or whether the early findings represent a reproducible biological effect
Choosing Your Reconstitution Liquid: A Quick Comparison Bac water is the workhorse for most multi-use peptides, but it's not the only option