Retinol, a vitamin A derivative, is a potent skincare ingredient known for addressing multiple skin concerns, including aging and acne. It works by stimulating cell turnover and collagen production, resulting in smoother, brighter, and more youthful-looking skin. When using retinol, start with a low concentration, gradually increasing the strength and frequency, and always wear sunscreen, as it can increase sun sensitivity. Overall, retinol is a valuable addition to many skincare routines.