UPA GHK-CUWhat is GHK Cu? GHK Cu is a complex consisting of the tripeptide GHK (glycyl histidyl lysine) and copper (Cu). GHK was first discovered in 1973 by Dr. Loren Pickart, who found it caused older human liver tissue to produce proteins more characteristic of younger tissue. This resulted in GHK being originally described, specifically, as a liver cell growth factor. However, as research continued, experts found that GHK could modulate a number of different