Current evidence supports excellent safety for long-term use with appropriate cycling
10.3390/jcm9113746 J Clin Med
Abstract Background Glutathione (GSH), a pivotal non-protein thiol, can be biosynthesized through three pathways in different organisms: (1) two consecutive enzymatic reactions catalyzed by -glutamylcysteine synthetase (Gsh1 or GshA) and glutathione synthetase (Gsh2 or GshB)
In double-blind, placebo-controlled trials, daily application of GHK-Cu cream at 3% concentration for 12 weeks produced a 70% increase in skin collagen thickness as measured by ultrasound imaging, a 40% increase in skin elasticity, and visible reduction in fine lines and wrinkles
Key Ingredients Glutathione: A potent antioxidant and skin-clarifying agent that targets the root causes of uneven skin tone, effectively promoting a visibly transparent and luminous appearance
1 Glutathione exists in two forms within living organisms: reduced glutathione (G-SH) and oxidized glutathione (G-S-S-G)