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With a molecular weight of just 403.93 Da well below the 500 Da cutoff typically associated with significant skin penetration GHK-Cu is small enough to penetrate the stratum corneum (outer skin layer) in concentrations sufficient to activate regenerative processes

It is found in small amounts in human plasma and is known to decline with age, which has led to increased interest in its supplementation for skin and cellular health

This matches the general pattern in hair loss research, where many promising preclinical compounds show attenuated effects in humans

Hair growth studies showed efficacy comparable to 5% minoxidil with increased follicle size

Blood Pressure Effects: Most users experience no cardiovascular side effects

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