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GHK-Cu is a human tripeptide with a wide range of biological effects, including stimulation of collagen production, wound healing, and modulation of gene expression. Pickart & Margolina, Oxidative Medicine and Cellular Longevity How GHK-Cu Works Stimulates Collagen and Elastin Production GHK-Cu promotes the synthesis of collagen, elastin, and glycosaminoglycanskey components of the skins extracellular matrix

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Dosing Comparison: Selank vs Semax The dosing approach for these two peptides also differs based on their effects

C.Herrera-AazcoP.et al (2023)