SK-II Whitening Source Derm-Revival Program effectively reduces melanin process and the formation of dark spots. Peroxide that potentially moves around within the skin - is a key contributor to the melanin production process and cause for the unpredictability of new spots. Whitening Source Derm-Revival Program's breakthrough glyco-technology contains concentrated whitening actives that target stubborn spots and fights against pigmentation after sun exposure. Each disc of the smart melting film, which dissolves in only 15 minutes, contains as much Vitamin B3 as that in seven pearl-sized drops of the Whitening Source DermDefinition. The mask leaves a soft, crystal clear and luminous complexion.