A 2018 review in the International Journal of Molecular Sciences compiled the regenerative-research findings against the backdrop of transcriptomic profiling that flagged thousands of human genes as up- or down-regulated under GHK-Cu exposure (PMID 29986520)
As the oxidative burden on the nervous system decreases, the autonomic nervous system can begin to shift back toward parasympathetic dominance (the "rest-and-digest" state)
It works by stimulating the pituitary gland to release more growth hormone, which in turn triggers the release of insulin-like growth factor 1 (IGF-1)
Stimulates collagen and elastin production for firmer, smoother skin. Accelerates wound healing by promoting cell migration and reducing scars. Provides antioxidant protection against free radicals and UV damage. Reduces fine lines, wrinkles, and hyperpigmentation through remodeling. Enhances blood flow and angiogenesis for better nutrient delivery. A 12-week thigh skin study found GHK-Cu improved collagen in 70% of participants versus 50% with vitamin C
they are deeply interconnected through the shared mechanism of oxidative stress and cellular energy failure
doi: 10.3389/fnut.2025.1686777 Received 15 August 2025 Revised 15 November 2025 Accepted 28 November 2025 Published 12 January 2026 Volume 12 - 2025 Edited by Andrea Orellana-Manzano, Escuela Superior Politcnica del Litoral (ESPOL), Ecuador Reviewed by Paulina Cerda Opazo, Autonomous University of Chile, Chile Aliakbar Fazaeli, Ardabil University of Medical Sciences, Iran Updates Copyright 2026 Garutti, de Scordilli, Alberti, Mazzeo, Michelotti, Fagioli, Del Conte, Casirati, Caccialanza, Bartolini and Puglisi