"HADALABO HAKUJYUN Medical Whitening Mask 20ml-4sheets" medicated whitening pack contains highly pure arbutin and hyaluronic acid Na. High purity of Arbutin controls melanin production to prevent blemishes and freckles caused by sun burn while moisturizing your skin. Mildly acidic just like healthy skin. Hypoallergenic, and free from fragrance, colouring, mineral oil and alcohol. This is an over-the-counter product.