GHK Cu Youthful Skin, Healthy Cells, Vibrant You. GHK Cu Peptide Therapy Collagen & Skin Renewal Two Weeks on GHK CU by Rory Uphold The Ladies Room 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 HealthyDerm Copper Peptides GHK Cu Beef Tallow for Skin: Blue Balm with Methylene Blue, Manuka Honey & Vitamin E Natural Face and Body Moisturizer for Mature, Dry & Sensitive Skin 2OZ Squalane + Copper Peptide (GHK Cu) Rapid Plumping Serum