GHK-Cu (Copper Peptide)

GHK-Cu is a naturally occurring copper-binding tripeptide (glycyl-histidyl-lysine) studied for skin remodeling, wound healing, and antioxidant effects. It is widely used as a cosmetic ingredient but is not an FDA-approved drug for treating any medical condition. Nothing here is medical advice.

What is GHK-Cu?#

GHK-Cu is a small tripeptide — glycine, histidine, and lysine — bound to a copper ion. It occurs naturally in human plasma, saliva, and urine, and its concentration in the body declines with age, which is part of why it became interesting to researchers studying skin aging and repair. It is found both in cosmetic skincare formulations and as a lyophilized research compound.

What is GHK-Cu used for?#

By far its most common real-world use is as a cosmetic ingredient (often listed as "copper tripeptide-1") in serums and creams marketed for skin firmness, texture, and the appearance of fine lines. In laboratory and clinical-cosmetic research, GHK and GHK-Cu have been studied for:

• Collagen and elastin synthesis in skin cells.
• Wound healing and tissue remodeling.
• Antioxidant and anti-inflammatory activity.
• General skin-barrier and appearance benefits.

It is not an approved drug for treating any disease. Cosmetic claims about appearance are regulated differently from medical claims about treatment.

Is topical GHK-Cu different from injectable GHK-Cu?#

Yes, and the difference is important for safety. Topical GHK-Cu in cosmetics has a long history of personal-care use and a generally favorable tolerability profile. Reconstituted, injectable research-chemical GHK-Cu is a different matter: it is not FDA-approved for human use, its risks are largely uncharacterized, and copper handling in the body is tightly regulated. This page describes both for education only and does not recommend injectable use.

Is GHK-Cu FDA-approved?#

GHK-Cu is used as a cosmetic ingredient, and cosmetics in the U.S. do not require the pre-market drug approval that medicines do. It is not an FDA-approved drug for any medical condition, and injectable research-chemical forms are not approved for human use. A dermatologist or licensed clinician can clarify what is appropriate for an individual.

Does GHK-Cu help with hair or anti-aging?#

Some cosmetic research and products explore copper peptides for scalp, hair appearance, and skin aging, and there is genuine interest in this area. However, the evidence is limited and GHK-Cu is not an approved treatment for hair loss or any aging-related condition. Marketing claims often outpace the science, so a dermatologist's input is the most reliable guide.

How is research-grade GHK-Cu reconstituted?#

Lyophilized GHK-Cu is reconstituted by slowly adding bacteriostatic water down the vial wall and swirling gently; the dissolved solution typically turns a characteristic blue color from the copper ion, which is expected. Our reconstitution guide and mixing-math guide cover the process in full. This is education only, not an instruction to self-administer.

What are the safety considerations?#

Topical cosmetic GHK-Cu is generally well tolerated, though it can cause irritation or contact reactions in some people; patch-testing a new product is sensible. For any non-cosmetic, research-chemical form, the unknowns are large and copper balance in the body matters, so a licensed clinician or dermatologist should be consulted first.

The bottom line#

GHK-Cu is a natural copper tripeptide best known as a cosmetic skincare ingredient and studied for skin repair and antioxidant effects. It is not an FDA-approved drug, and injectable research-chemical forms are not approved for human use. Use this page for education, patch-test cosmetics, and consult a dermatologist or licensed clinician before any health decision.