Combat signs of ageing with paula's choice resist 1% retinol booster, a powerful concentrate that works to improve the appearance of ageing or sun damaged skin'. '.strtoupper('d')esigned to enhance the anti ageing properties of your favourite serum or moisturiser, the treatment can be added into your current daily routine to deliver wrinkle reducing, skin firming benefits'. '.strtoupper('e')nriched with 1% stabilised retinol, the antioxidant rich booster helps stimulate collagen production, repair damaged skin and improve the look of wrinkles, brown spots, loss of firmness and uneven tone'. '.strtoupper('l')ightweight in texture, the treatment's dose of willow herb and anti inflammatories leave skin feeling calm and soothed with improved tone and texture'. '.strtoupper('k').n'. '.strtoupper('s')uitable for all skin types.