Palmitoyl Tripeptide-1 (jise palmitoyl oligopeptide ya pal-GHK bhi kehte hain) ek synthetic peptide hai jo skin ke andar fibroblasts ko signal karta hai aur collagen aur extracellular matrix banane mein support karta hai. Yeh anti-aging formulations mein use hota hai aur aksar doosre peptides ke saath pair kiya jaata hai.