GHK Cu (Copper Peptide) is a naturally occurring copper complex that decreases significantly as we age. This powerful peptide is known for its ability to upregulate the production of collagen and elastin, making Synergy of GHKCu and hyaluronic acid on collagen IV upregulation via fibroblast and exvivo skin tests Jiang 2023 Journal of Cosmetic Dermatology Wiley Online Library GHK Cu vs NAD+: Which Longevity Peptide Should You Take or Stack? Dr. Brenner Copper Peptide Serum with GHK Cu peptide, Argireline and Matrixyl 3000 Anti Aging Moisturizer for Fine Lines and Skin Elasticity TikTok Shop GHK Cu Glow Peptide Stack for Skin Rejuvenation Jennifer R. Berman MD