Tripeptide-1 (jishe Glycyl-L-Histidyl-L-Lysine ya GHK kehte hain) ek signaling peptide hai jo anti-aging skincare mein use hota hai. Yeh collagen aur extracellular matrix ke production ko support karta hai. Isse skin ka firmness aur elasticity improve hota hai aur dull skin ko better texture milta hai.