This guide features all you need to know about Guinot’s Crème Age Summum and your ageing skin. It will help you to get your head around the way your skin works aged 40 plus: sun damage, cell immunity and structural changed are all explained. But we’ve made it real simple. Get ready to understand the power of Guinot’s Crème Age Summum and say goodbye to an unpredictable, ever- changing complexion. Hello, healthy glow.