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A 2024 review in BioImpacts synthesizing the topical GHK-Cu evidence concluded that the peptide has consistent anti-wrinkle and skin-rejuvenating activity in human studies, though formulation and delivery remain ongoing challenges [5]

Research supports both oral and injectable administration

While supplements might support hair health as part of a holistic approach, they're not standalone solutions for hair loss

However, preclinical studies demonstrate therapeutic effects with once-daily or even less frequent administration, suggesting tissue distribution, receptor binding, or cellular signaling effects extend beyond plasma clearance