People are turning themselves into lab rats': the injectable peptides craze sweeping the US Well actually The Guardian Tripeptidecopper complex GHKCu (II) transiently improved healing outcome in a rat model of ACL reconstruction Fu 2015 Journal of Orthopaedic Research Wiley Online Library GHK Cu before and after : r Biohackers 12 weeks in, and my skin has NEVER looked better! GHK peptides are doing their thing. Alright, I need to give you an updateit's been 12 weeks since I started using GHK