This is why GHK-Cu has accumulated such interest in the regenerative medicine and aesthetic dermatology literature
What are the benefits of glutathione for skin
It's worth noting that glutathione supplementation for skin brightening requires patience and consistency
Compared to BPC-157, which acts primarily via the nitric oxide and growth hormone receptor pathways, and TB-500, which functions through actin sequestration and VEGF signalling, GHK-Cu operates largely through copper-mediated gene expression modulation and extracellular matrix remodelling
The quantitatively important relationship between homocysteine metabolism and glutathione synthesis by the transsulfuration pathway and its regulation by redox changes
In light of the potential widespread occurrence of protein glutathionylation (vide supra), it does not seem unreasonable to propose that this mechanism may prove to be functionally protective for a number of critical cellular proteins