展开Formulated at the precise concentration proven to deliver maximum amounts of vitamin C to the skin Serum 20 is now formulated with AOX+ advanced antioxidant technology combining ferulic acid with 20% L-ascorbic acid to enhance antioxidant performance. Designed to restore and protect healthy looking skin this lightweight and fast-absorbing serum neutralizes free radicals defends against environmental damage and helps prevent premature signs of aging. Ideal for normal to oily skin.Benefits:AOX+ advanced antioxidant technology – combines ferulic acid with L-ascorbic acid to enhance antioxidant performanceReduces the appearance of fine lines and wrinkles neutralizes free radicals defends against environmental damage and stimulates collagen synthesisUsing Duke-patented vitamin C technology delivers 20% L-ascorbic acid to the skin – highest level effectively absorbedOnce absorbed can't be washed or rubbed off remaining protective for up to four days – an excellent addition to sunscreensIdeal for normal or oily skin