ghk-cu hair before after Male Restoration & with PRF and Cu Peptide Before and After:
Description
doi: 10.1016/j.ophtha.2015.09.005

doi: 10.1200/PO.21.00076

It still would not be FDA-approved, and formal rulemaking would still need to follow before things are settled

Insulin-like growth factor 1 inhibits hair cell apoptosis and promotes the cell cycle of supporting cells by activating different downstream cascades after pharmacological hair cell injury in neonatal mice