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In fibroblast cultures, GHK-Cu has been shown to increase proliferation and upregulate markers of regenerative potential, such as integrins and p63, indicative of enhanced stemness and reparative capacity (Pickart and Margolina 2018

So they bought whatever Amazon recommended, got no results, and assumed glutathione doesnt work for them. It wasnt them

Most clinical and research GHK-Cu protocols sit at 0.52 mg per day subcutaneously, and many patients do not inject every day - 23 injections per week is common for skin and maintenance goals

Proteomic analysis of ubiquitin ligase KEAP1 reveals associated proteins that inhibit NRF2 ubiquitination