GHK-Cu is a naturally occurring copper-binding tripeptide with a development status of "cosmetic use / preclinical". The Institute rates the strength of its published evidence as moderate. A copper-binding tripeptide found in human plasma, extensively studied in skin-repair and cosmetic contexts.
This report covers the GHK-Cu samples processed in our most recent testing cycle. Every specimen was purchased anonymously at retail, transferred under chain-of-custody documentation, and analysed by an independent contract laboratory.
The Institute has independently tested 4 GHK-Cu samples from 4 companies. 75% met their label claims on purity and content. Measured purity ranged from 69.1% to 98.8%, averaging 90.7%. 1 sample failed verification outright. Every specimen is published in full, including the laboratory that ran it.
The Peptide Institute is an independent research institute. We do not sell products, we do not accept vendor sponsorship, and we publish results that reflect badly on companies as readily as results that do not.
