Brighten your skin with Dermalogica's serum. Targets dark spots effectively. 1 oz. Sealed in box Clinically proven to start fading dark spots in as little as 1 week! Dermalogica's PowerBright Dark Spot Serum is an advanced serum, developed for all skin tones, that begins to diminish the appearance of pigmentation within 7 days and continues to work over time - so there's nothing left to hide!