Night is the best time for anti ageing creams to work their magic, as the complexion is at its least tense – skin doctors youthcell youth activating night concentrate is clinically proven to delay the effects of chronological skin using a dual system to keeps those wrinkles at bay'. '.strtoupper('a')t the cutting edge of plant stem cell technology, skin doctor combines matrixyl 3000 and renovage to tackle the lines on the top layer of skin, while phytocelltec repairs the base epidermis flesh to tone it back into its youthful condition'. '.strtoupper('w')hen used at night skin doctors youthcell youth activating night concentrate can reduce the signs of ageing by relaxing the skin in just 4 weeks'. '.strtoupper('d')irections of use to complete your skincare routine spread evenly over the face each evening.