Xtreme Brite XT-Active Serum Intensive Radiance. This XT-Active Repair serum is intended to perfect and brighten your complexion and give it a uniform radiance. Thanks to its formula, which is perfectly balanced and rich in invaluable elements it progressively lightens the skin for a flawless complexion that glows with a youthful radiance. A repair serum, that not only reduces dark spot, but also smoothes and refines the skin and promotes exceptional radiance. It is the most active skin repairing serum.