Expect gradual improvement rather than overnight transformation
A 2016 comparative study published in Nature Scientific Reports demonstrated that GHK-Cu produced no cytotoxicity to human keratinocytes at concentrations up to 5,800 micromolar over 72 hours and did not induce inflammatory biomarkers, unlike other copper compounds tested alongside it
(7) Tianqi Liu, Ying Liu, Xiaoyu Zhao, Liguo Zhang, Wei Wang, De Bai, Ya Liao, Zhenyuan Wang, Mi Wang, Jiaheng Zhang, Thermodynamically stable ionic liquid microemulsions pioneer pathways for topical delivery and peptide application, Bioactive Materials, Volume 32, 2024, Pages 502-513 (8) Malinda KM, Sidhu GS, Mani H, Banaudha K, Maheshwari RK, Goldstein AL, Kleinman HK
Studies Supporting Glutathione and Weight Loss Clinical studies have shown that glutathione supplementation may improve certain groups insulin sensitivity and weight loss