A 2018 review in the International Journal of Molecular Sciences (Pickart and Margolina) found the cosmetic anti-aging case for GHK-Cu rests more on cell-culture and mechanism studies, showing it stimulates collagen and elastin production in lab settings, than on large, face-specific clinical trials measuring actual wrinkle reduction in real people
Funding This work is funded by KBRI (25-BR-02-01, 25-BR-05-01), the Ministry of Trade, Industry and Energy (RS-2024-00507932), and by the Ministry of Science and ICT (2022R1A5A202954611 and RS-2025-16065563)
and improve strength, muscle regeneration, and growth
However, factors like aging, stress, UV exposure, lack of sleep, and alcohol consumption can significantly reduce glutathione levels in the body