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GHK Peptide as a Natural Modulator of Multiple Cellular Pathways in Skin Regeneration BioMed Research International Comprehensive review demonstrating GHK-Cu stimulates collagen and elastin synthesis, modulates metalloproteinase activity, promotes fibroblast function, and operates through multiple signaling mechanisms

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The other is appearance-related interest, especially skin clarity and overall radiance

Interest comes from adults with demanding fitness routines, former athletes returning to activity, recreational competitors, physically active professionals, and people whose weekends have become significantly more intense than their weekdays