Meet the needs of skin altered by acne or ageing with the institut esthederm intensive retinol oil serum, a high concentration antiwrinkle and healing serum.the intensive retinol oil serum will accelerate cellular renewal, redensifying and helping to strengthen the structure of the skin to create a youthful, more unified look'. '.strtoupper('t')he formula contains a 0.3 concentration of retinol, the most active form of vitamin a, which works to target wrinkles and firm the skin.an everyday solution for deep wrinkles, acne scaring and photoageing, this targeted serum will unveil a smoother, visibly brighter complexion day after day.apply alone every night to the face, neck and dampeacutecolletampeacute'. '.strtoupper('i')f burning or discomfort is felt, combine a small amount with the institut esthederm intensive retinol cream and gradually increase quantity until normal use of treatment.during treatment use sun protection and avoid alcoholcontent cleansers and aggressive exfoliators'. '.strtoupper('d')o not use in the summer.