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Could its developing reputation link it to actual biological effects

GHK-Cu addresses each of these issues through specific biological mechanisms

Proc Natl Acad Sci U S A 85:81768180

Wojcik SM, Rhee JS, Herzog E, Sigler A, Jahn R, Takamori S, Brose N, Rosenmund C

Safety, Side Effects and Regulatory Status in the UK The safety profile of peptides used for erectile dysfunction is poorly characterised, and their regulatory status in the UK is clear: none of the commonly discussed peptides for ED are licensed by the MHRA for this indication

doi: 10.3389/fbioe.2025.1729166 Received 21 October 2025 Revised 01 December 2025 Accepted 17 December 2025 Published 15 January 2026 Volume 13 - 2025 Edited by Ling Wang, Dalian Medical University, China Reviewed by Nicola Alessio, University of Campania Luigi Vanvitelli, Italy Yesuf Adem Siraj, Bahir Dar University, Ethiopia Updates Copyright 2026 Hu, Li, Hu, Shan, Tang, Jiang, Yi, Chen, Jin, Wang and Wang