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GHK-Cu is a copper-binding tripeptide used as a cosmetic ingredient with supportive but less rigorous data
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Cellular response DSIP modulates the sleep-wake cycle by influencing cortisol rhythms, promoting delta-wave sleep, and lowering stress hormones
J Am Acad Dermatol , 40(6 Pt 1):930937
Results A recurrent pattern emerges: while mechanistic plausibility remains strong across peptide classes, clinical maturity varies significantly
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