Shin J, Park H, Kim H, et al
Bulletin of Experimental Biology and Medicine, 153 (2), 255-258
Amino-acid analysis, sequence, synthesis and activity of the nonapeptide
GHK-Cu rebuilds the collagen and structural proteins that keep your tissue (and your skin) strong and resilient
Look for: a trusted brand, clear indication of glutathione concentration, favourable formulation (non-comedogenic, gentle surfactants, pH balanced), minimal harsh fragrances/alcohols, and ideally independent reviews
Remember, everyones body responds differently to these compounds, so its always best to start with lower dosages and consult with a medical professional