What is the evidence for GHK-Cu?
GHK-Cu is biologically active and has limited topical human research, but the evidence does not validate broad injectable, systemic, or anti-aging claims.
DIRECT ANSWER
GHK-Cu evidence summary.
GHK-Cu is biologically active and has limited topical human research, but the evidence does not validate broad injectable, systemic, or anti-aging claims.
Reviewed August 8, 2026. Each statement links to its evidence record, followed by the primary and official sources used for this answer.
Limited topical research exists, including a 13-patient randomized study that did not show objective improvement in most measured outcomes.
Open evidence recordCell, skin, and wound-remodeling literature is broader than the decision-grade human evidence.
Open evidence recordTopical cosmetic findings cannot be transferred to injected products or systemic outcomes.
Open evidence recordPRIMARY & OFFICIAL SOURCES
Sources for this answer.
3 source records, with duplicates removed.