Crystal Retinal 1 Stable Retinal Night Serum Gentle-Strength Vitamin A Our entry-level gentle-strength vitamin A is ideal for those who have really sensitive skin or are looking to incorporate a low strength but highly effective vitamin A serum in their routine. 0.01% Encapsulated Retinaldehyde. Unmatched in its age-defying power, retinal can deliver results comparable to clinical-grade vitamin A up to 11 times faster than classic forms of retinol.1 The ground-breaking overnight serum visibly minimises fine lines and wrinkles; firming and plumping the complexion to resurface skin texture and soften the face. Featuring hyaluronic acid, glycerine and vitamin E, it hydrates skin at every level to deliver a supple, even-toned, more youthful-looking complexion. More than that, it actively helps reduce blemish-causing bacteria to keep skin clear and balanced. In just 4 weeks, the skin is noticeably younger, smoother and undeniably radiant.