ghk-cu inhibits 5-alpha reductase vs Other Copper Peptides: Complete Comparison Guide for Skin and Hair GHK-Cu for Hair Follicle Activation:

GHK-Cu should still come through a licensed medical provider, not a research chemical vendor or social media seller

The topical skin data from Miller et al

It stabilizes intestinal permeability and enhances cytoprotection, making it a promising candidate for mitigating NSAID-induced gastroenteropathy and leaky gut syndrome

6 Structural modification of conjugation of a fluoroethyl moiety increases the lipophilicity of Crizotinib and results in enhanced brain permeability

But safety and efficacy are independent questions, and conflating them is a persistent error

A 2017 study reported that researchers tested chemicals like minoxidil, diazoxide, and a copper-binding peptide (PC1031) on a macaque model of baldness