Water- and silicone-free, The Ordinary's Retinol 0.5% in Squalane features highly stable retinol, an ingredient that can reduce the appearance of aging with impressive results. A powerhouse form of vitamin A, retinol encourages cell turnover, revealing healthier, softer skin while also tackling blemishes, dark spots, and defying signs of aging including softening the appearance of fine lines and wrinkles, and uneven tone. Retinol can cause significant irritation, including redness and peeling but many feel that its significant effects counterbalance this; The Ordinary recommends building your skin's tolerance to retinol with lower concentrations such as {Retinol 0.2% in Squalane} to minimize discomfort.