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Why it matters for anti-aging: GHK-Cu has been shown to: Increase collagen production, improving skin firmness and elasticity Reduce fine lines and wrinkles Speed up wound healing and skin repair Promote hair growth Activate genes associated with youthfulness while suppressing pro-aging genes Scientific backing: A 2018 study in Oxidative Medicine and Cellular Longevity found that GHK-Cu improved antioxidant activity, modulated over 4,000 genes related to tissue repair and inflammation, and supported skin remodeling at a genetic level