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Mukherjee S, Date A, Patravale V, et al

Peer-reviewed research suggests that GHK-Cu helps improve visible signs of photoaging over approximately 12 weeks, including laxity, fine lines, wrinkle depth, and overall skin clarity, while supporting skin renewal and resilience

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For oral administration, clinical trials have studied doses ranging from 1-30 mg daily, with typical protocols using 1-2 mg per dose on an empty stomach