Medik8 Crystal Retinal 10 revitalizes skin while you sleep. This stable retinal night serum gently works to improve the appearance of wrinkles, texture, and tone. Its innovative formula features retinaldehyde, a next-generation form of vitamin A, for effective and fast-acting results. The crystal encapsulation system releases vitamin A gradually, preventing irritation and maximizing potency. Enhanced with hyaluronic acid and glycerin, it deeply hydrates, leaving skin visibly smooth and supple.