skinChemists Lightning is a brightening serum that will improve the luminosity and tone of your complexion. Formulated with 4% active ingredient Whitonyl which lightens senescence spots and evens out hyper-pigmentation, the serum also has conditioning and pH-regulating properties to leave your skin feeling soft, supple and balanced. A wonderful multi-tasker, it will reduce the appearance of age spots, acne scars and irregular pigmentation to leave your complexion looking even-toned and radiant. - L.M. Directions for Use: For best results, use twice daily Apply a few drops to your fingertips and massage into the desired area If you have sensitive skin, a patch test is recommended behind the ear, 24 hours before applying the serum