It is not a synthetic drug designed to block or force a single biological pathway
Use Cases: When Each Route Fits Topical GHK-Cu -- Localized Skin and Hair Goals The evidence supports topical use for: Facial aging and wrinkle reduction -- the most clinically validated use case, with multiple controlled studies Post-procedure recovery -- documented benefits after CO2 laser resurfacing Hair and scalp health -- community reports describe topical application to the scalp, though controlled hair-specific studies are limited General skin quality -- increased density, thickness, elasticity, and collagen documented in clinical studies Common audience: users primarily targeting cosmetic skin outcomes with the strongest available evidence base and the simplest application method
Just be mindful that vitamin C can be sensitizing for some skin types, so if you're new to these ingredients, monitor how your skin responds
(2012) The down-regulation of miR-125b in chronic lymphocytic leukemias leads to metabolic adaptation of cells to a transformed state, Blood , 120 , 2631-2638, doi: Wang, F., Li, L., Chen, Z., Zhu, M., and Gu, Y