When you reach your mid 30s, your skin care needs change dramatically. Moisture levels in your skin naturally begin to decrease in this fourth decade of your life. As your skin becomes dryer, it also loses some of its suppleness and tone, making it more susceptible to creasing and wrinkling as you change your facial expressions throughout your day. The repetitive motions of smiling, frowning, squinting and furrowing your brow gradually begin to make permanent marks in your skin, which are known as expression lines. With the right products, such as those in the NUXE Merveillance range, you can help slow the appearance of these lines and keep your skin looking younger longer.