Palmitoyl Tetrapeptide-4 ek synthetic ingredient hai jo skin ke deep layers mein fibroblasts ko signal deta hai taaki collagen aur extracellular matrix proteins zyada banein. Isse fine lines kam dikhte hain aur skin ka firmness improve hota hai. Cosmetic formulations mein use hota hai skin ko plump aur rejuvenated dekhane ke liye.