Decapeptide-4 ek synthetic peptide hai jo dasa amino acids se bana hota hai. Isko cosmetic products mein use karte hain kyunki iska claims hai ke yeh collagen banane mein madad karta hai aur skin ko repair karne mein help karta hai. Isliye anti-aging benefits ke liye popular hai. Par evidence mostly lab studies tak hi limited hai, practical skin pe kitna kaam karta hai yeh abhi clear nahi hai.