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The main differences between them are their potency and skin penetration, with GHK-Cu being more active and Pal-GHK being better able to deeply penetrate the skin
Fluid retention and joint discomfort, a recurring effect of growth-hormone-axis stimulation across the secretagogues in this list
Sikiric P, Seiwerth S, Grabarevic Z, Petek M, Rucman R, Turkovic B, et al
Purity 99% verified by third-party HPLC testing
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