The Ordinary Retinol 0.5% in Squalane is a water-free serum that combines pure retinol with moisturizing squalane. This advanced formula helps reduce signs of aging while providing hydration, making it an effective solution for those seeking to improve skin texture and appearance. This serum should be applied in the evening after water-based treatments but before heavier creams. Start with using it 1-2 times per week and gradually increase frequency as tolerated. The product should be stored in a cool, dry place and used within 3 months of opening. Not recommended during pregnancy or breastfeeding. Sun protection is essential when using this product as retinol can increase UV sensitivity. Do not use with other retinoid treatments. Some users may experience temporary redness, peeling or acne increase during initial use.