This 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. The entry point for those who are new to vitamin A or have tried mild retinol formulas and the answer to those looking to prevent early signs of skin ageing. Rediscover youthful skin with Crystal Retinal, Medik8's latest innovation in vitamin A is now available in four strengths. Formulated with stabilised retinal, a powerful derivative of vitamin A with next-generation anti-ageing results. The ground-breaking overnight serum visibly minimises fine lines and wrinkles; firming and plumping the complexion to resurface skin texture and soften the face.