The Retinol 0.5% in Squalane serum by The Ordinary is a lightweight, oil-free formula designed for all skin types, including sensitive skin. This serum features a 0.5% concentration of retinol, a form of vitamin A, combined with squalane, a natural oil that helps soothe and hydrate the skin. The product is non-comedogenic, meaning it will not clog pores, and is formulated to be hypoallergenic and fragrance-free. Regular use helps improve the appearance of fine lines, wrinkles, dark spots, and uneven skin texture while promoting collagen production and assisting in the reduction of acne. To use, apply a few drops to clean, dry skin at night, starting once a week and gradually increasing frequency based on tolerance. Always apply a sunscreen with SPF 30 or higher during the day while using this product.