The Youth Signal
Glycyl-L-Histidyl-L-Lysine Copper Complex
GHK-Cu is a naturally occurring tripeptide-copper complex found in human plasma, saliva, and urine. Discovered by Dr. Loren Pickart in the 1970s, GHK-Cu levels decline significantly with age — from about 200 ng/mL in plasma at age 20 to about 80 ng/mL by age 60. It is one of the most extensively researched peptides for skin rejuvenation, wound healing, and anti-aging applications.
GHK-Cu acts as a powerful signaling molecule that resets gene expression patterns toward a younger, healthier state. Its copper complex enables unique biological activities including collagen synthesis, antioxidant enzyme upregulation, and stem cell attraction to injury sites.
Stimulates collagen Types I, III, and V synthesis, the primary structural proteins responsible for skin firmness, elasticity, and wound tensile strength.
Upregulates production of decorin, a proteoglycan that regulates collagen fiber assembly and produces smoother, more organized tissue architecture.
Activates metalloproteinases (MMPs) to remove damaged proteins and scar tissue while simultaneously promoting new healthy tissue formation.
Attracts immune cells and stem cells to wound sites through chemotactic signaling, accelerating the healing cascade.
Modulates expression of over 4,000 human genes, shifting patterns toward those seen in younger, healthier tissue states.
Clinically demonstrated to increase collagen production, improve skin density and elasticity, reduce fine lines, and restore a more youthful skin appearance.
Accelerates healing of surgical wounds, burns, and chronic ulcers while reducing scar formation and improving cosmetic outcomes.
Research shows GHK-Cu increases hair follicle size, stimulates hair growth, and may help counteract age-related hair thinning.
Modulates over 4,000 genes, upregulating repair-associated genes and downregulating inflammation and tissue destruction genes, creating a younger genetic expression profile.
GHK-Cu cream significantly increased collagen production and skin thickness in clinical studies, with visible improvements in fine lines and skin elasticity at 12 weeks.
Genome-wide analysis showed GHK-Cu modulated expression of 4,093 human genes, resetting patterns from an aged state toward a younger, healthier profile.
GHK-Cu demonstrated superior wound healing compared to standard treatments including increased wound closure rate, reduced scar formation, and improved tensile strength.
GHK-Cu has an excellent safety profile as a naturally occurring compound in human plasma. Topical applications have been used commercially for decades with minimal adverse effects. Injectable forms require more caution and physician supervision.
Research Status
GHK-Cu has over 50 years of research since its discovery by Dr. Loren Pickart. It has extensive clinical evidence for topical skin applications and robust preclinical data for systemic effects. It is one of the most commercially successful peptides in skincare.
Regulatory Note
GHK-Cu is widely available in topical cosmetic formulations without a prescription. Injectable forms are available through compounding pharmacies with a physician prescription. Not FDA-approved as a drug.