SOURCE-BACKED ANSWER
What are the main evidence limits for GHK-Cu?
Topical cosmetic findings cannot be transferred to injected products or systemic outcomes.
Related recordsGHK-Cu
DIRECT ANSWER
GHK-Cu evidence limits.
Topical cosmetic findings cannot be transferred to injected products or systemic outcomes.
Reviewed August 8, 2026. Each statement links to its evidence record, followed by the primary and official sources used for this answer.
01Main limitation
Topical cosmetic findings cannot be transferred to injected products or systemic outcomes.
Open evidence record02Human evidence boundary
Limited topical research exists, including a 13-patient randomized study that did not show objective improvement in most measured outcomes.
Open evidence record03What the score does not mean
Evidence-depth scores do not establish effectiveness, safety, product quality, or personal suitability.
Open evidence recordPRIMARY & OFFICIAL SOURCES
Sources for this answer.
3 source records, with duplicates removed.