GHK Cu Copper Peptide Benefits, Uses & Safety Intra V GHK Cu Peptide We talk a lot about treatment but healing is where the real work happens. After stretch mark revision, treatment is only half the story. Healing is the other half. For Did you know you can use our Copper P (Peptide) Concentrate Serum on your stretch marks? GHK CU Copper Peptide, Hair & Scalp Serum, 2 oz (60 ml) GHK Cu Injectable Team Wellcore