Reddit asked questions. Here are answers. GHK Cu isn't newit's just not heavily marketed for hair (yet). Dr. Loren Pickart discovered it in the 70s. Decades of clinical research. Solid mechanism. We screwed Amazon.com: GHK Cu Copper Peptide Supplement, Anti aging and revitalizing skin, strengthening hair roots: Precision nutrition capsules improve skin elasticity and increase hair density, 90 vegan capsules. : Health & Household ACS Applied Materials & Interfaces Vol. 17 No. 23 ACS Publications PSA] Finally, a Dr. explains the mechanism behind the "copper uglies" : r SkincareAddiction 'People are turning themselves into lab rats': the injectable peptides craze sweeping the US Well actually The Guardian GHK Cu Tripeptide 5 mg 60 Sublingual Tablets SuperSmart