Squalane is one of skincare's most skin-compatible hydrators. Usually derived from olives or sugarcane, it closely mimics the skin's own natural oils, so it absorbs easily and helps lock in moisture without feeling heavy or greasy. Rather than simply drawing water in like a humectant, squalane helps reduce moisture loss, leaving skin looking plump, smooth and radiant, while its antioxidant properties help defend the look of skin against everyday environmental stress. It's also highly stable and suits most skin types, even oily skin. Our edit brings together the best squalane serums, creams and mists from the K-beauty world.