Researchers observed that GHK-Cu influences expression of over 4,000 human genes based on microarray studies, with significant effects on genes involved in collagen synthesis, metalloproteinase regulation, antioxidant defense (SOD, glutathione), and growth factor signaling (TGF-, VEGF, FGF)
Lighter skin may burn faster, but tan typically fades sooner
Like caffeine, urate (Alonso et al., 2008
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