This highly stable, water-free, high strength age-defying solution features 0.5% pure retinol. This special form of vitamin A has been proven to minimise fine lines, improve pigment problems, revitalise skin and make its overall appearance fresher and more youthful. As retinol can cause irritation, The Ordinary recommends beginning your regimen with lower concentrations (such as (Retinol 0.2% in Squalane)) to allow skin to build up tolerance. Water- and silicone-free, The Ordinary's Retinol 0.5% in Squalane features highly stable retinol, an ingredient that can reduce the appearance of ageing 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 ageing - 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 minimise discomfort.