Guerniss VC Serum N85 is usually used to brighten, whiten and lighten spots from the skin. It gives your skin a youthful glow. And of course, it is very much effective for fading dark spots and evening out skin tone and texture. It can be used after washing the face properly. If you are habituated to using a toner, then apply that at first. Let your skin dry. Then take a small amount of the serum. Apply onto the entire face and neck. Allow drying. This can be used daily and under make-up as well