can ghk-cu cause hair loss before and after : r/Biohackers GHK-Cu Peptide for Hair Growth:

showed that a 16 amino acids-long peptide fragment from the third helix of the antennapedia homeodomain called penetratin, is the membrane translocating moiety ( Since then, various CPPs with different physicochemical properties in terms of length, charge, hydrophobicity, and solubility have been identified and characterized from both natural and artificial origins (Xie et al., 2020)

Curve improvement doesnt happen for everyone, and it may not happen within the timeframe of the treatment it can take time

How fast does Dihexa work in experimental studies

Because they are already working in your body, peptides supply a remediation approach resembling natural pathways