Retinol ek Vitamin A ka derivative hai jo skin mein jaake retinoic acid mein convert hota hai. Yeh cell turnover badhata hai, collagen production improve karta hai, aur photoaging aur acne ke signs kam karta hai. Yeh over-the-counter anti-aging aur skin-renewal products mein bahut zyada use hota hai. PM mein use karna best hai aur saath mein SPF lagana zaroori hai.