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 non-comedogenic and hypoallergenic formula is fragrance-free and will not clog pores. 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. Start with once-weekly application, gradually increasing frequency based on tolerance. It is essential to use a sunscreen with SPF 30 or higher during the day while incorporating this product into your skincare routine.