GHK-Cu (Copper Peptide)

What is GHK-Cu?

GHK-Cu is a small tripeptide (glycine, histidine, lysine) tightly bound to a copper ion. It is found naturally in human plasma, where its concentration drops significantly with age — from roughly 200 ng/mL at age 20 to under 80 ng/mL by age 60. Much of the interest in GHK-Cu as a therapeutic peptide rests on the hypothesis that restoring it partially reverses age-related tissue decline.

How GHK-Cu works

GHK-Cu acts as a copper-delivery molecule and a signaling peptide. It binds and transports copper into cells, where copper is a co-factor for several enzymes involved in skin and connective tissue remodeling. It also directly modulates gene expression — proteomic studies suggest it influences several hundred genes related to tissue repair, anti-inflammatory pathways, and antioxidant response.

GHK-Cu for menopause and women over 40

Estradiol withdrawal accelerates skin thinning, collagen loss (around 30% in the first 5 years postmenopause), and reduced wound healing. GHK-Cu addresses these specific deficits at a mechanism level. It is one of the few peptides with both topical and injectable evidence relevant to midlife women.

For deeper coverage — clinical evidence, dosing, sourcing, and safety — see our dedicated GHK-Cu page, which we maintain as a separate clinical resource rather than duplicating here.

What the evidence shows

Multiple controlled trials show topical GHK-Cu improves skin thickness, elasticity, and visible signs of photoaging; smaller trials show wound-healing benefits. Injectable peptide data are largely observational and case-series; randomized human trials are still limited.

Evidence level: emerging for systemic / injectable use; moderate for topical skin endpoints.

Safety and dosing

Topical use has a long safety record. Injectable peptide use is compounded, requires a physician evaluation, and carries the standard considerations of any subcutaneous therapy. We evaluate eligibility on a case-by-case basis through our peptide therapy program. Specific dosing protocols vary by goal and patient profile and are determined by a kindr physician.

Where you will find it at kindr

GHK-Cu peptide therapy is offered under our peptide therapy program. Eligibility, dosing, and protocols are determined by a kindr physician on a case-by-case basis. See the full GHK-Cu clinical page for everything we recommend.

Medically reviewed by Dr. Ana Lisa Carr, MD, MBA
Board-Certified Family Medicine Physician · Lead Provider / Medical Reviewer
NPI 1689841744 · Last reviewed: May 10, 2026