GHK Cu for Skin: SIGNAL's Guide to Rejuvenation GHK Cu is a regenerative peptide that: Stimulates collagen + elastin Improves firmness + texture Speeds up healing after treatments Helps restore that healthy glow (not just fake Cu Peptide Before and After: What to Expect for Skin and Hair My friend Andy Hnilo uses GHK copper peptides in his Alitura skin care line, which helped him recover with almost no scarring from a horrific car accident that broke his jaw in five