Peptide regimen for toning and fat loss? Can GHK Cu Be Taken Orally? Oral GHK Cu Bioavailability, Tablets & Copper Peptide Safety Neurogan Health How long will a 50 mg supply of GHKCu last when dosing 2 mg daily for five consecutive days followed by two days off each week? What is GHK Cu? Dr. Ennis explains how this innovative copper peptide is changing the game for hair restoration and skin rejuvenation.GHK Cu can help: Stimulate hair growth Boost collagen