Powerbright Dark Spot SerumPowerbright dark spot serum starts fading dark spots in a week, and continues to diminish them over time. It also brightens and boosts skins natural luminosity. Light diffusing technology begins to balance the appearance of uneven pigmentation after one use, and continues working overtime. Clinical test results: 1 week starts fading dark spots 4 weeks begins reducing dark spots size 8 weeks reduces the number of dark spots