A naturally occurring copper peptide studied in dermatological and tissue-remodeling research.
GHK-Cu (glycyl-L-histidyl-L-lysine copper complex) is a naturally occurring copper-binding peptide found in human plasma, saliva, and urine. Levels of this peptide decline with age, which has driven research interest in its potential role in tissue remodeling and dermatological science.
GHK-Cu is not FDA-approved as a drug for any use. Cosmetic formulations containing this ingredient are regulated separately under cosmetic guidelines, but injectable or research-grade forms are not approved for human or veterinary use and are intended solely for laboratory research.