Clean your face firstly. take 3-5 drops in the palm of your hand and apply it to your face with your fingertips. massage the serum into your neck to ensure absorption. we recommend to apply the serum twice a day for day and night benefits: helps the skin to restore whiteness. prevents the skin from becoming loose, and leaves the skin white and supple. it can stay on the skin for more than 6 hours. suitable skin type : all skin type texture : serum recommended use : retinol c facial serum whitening brightening moisturising anti ageing spots removing essencetype : whitener helps the skin to restore whiteness. prevents the skin from becoming loose, and leaves the skin white and supple. its a good alternative for vitamin c