ghk-cu copper peptide hair loss evidence for Hair| Treatment for Women GHK-Cu Hair Growth Before and
Description
Elevated Bcl-2/Bax ratios and reduced cleaved PARP confirmed the anti-apoptotic effect (Pyo et al., 2007)

Kawakami, T., Kitaura, J., Xiao, W

Localized scalp injection increases dermal concentration at the follicle site but limits distribution to the immediate injection area practical for focal thinning but inefficient for diffuse patterns
M.AnD.HuppJ

The honest research caveat is that "theoretically additive" is not "experimentally additive" and a researcher who needs to claim synergy must run the combination versus the components in their own model
Methods 17 , 209216 (2020)