SK-II Facial Treatment Cleansing Oil in Beauty: NA. SK-II Facial Treatment Cleansing Oil in Beauty: NA. Reveal your clearest and most radiant skin with SK-II Facial Treatment Cleansing Oil. This delicate oil cleanser deep cleans and conditions the skin while instantly removing makeup and impurities. It contains a rich formula of Wild Rose Extract, Apple Seed Extract, and Pitera to lift away stubborn makeup, sunscreen, and excess sebum, leaving skin soft and fresh.. Pitera is rich in vitamins, amino acids, and minerals that improve the skin's natural rejuvenation process. Lightweight oil formula emulsifies with water to gently lift away makeup and impurities. Recommended for combination and oily skin types. 8.4 fl oz. Spread three to four pumps over dry face, then massage in a circular motion, add water to emulsify, and rinse. Follow with SK-II Facial Treatment Essence for even more radiance. SKTW-WU4. 730870307717. In the 1970s, SK-II scientists began a fervent quest to uncover a skincare ingredient that would make beautiful skin a reality. Researching a myriad of possibilities ranging from Chinese herbs to hot spring water - the secret they were looking for eluded them for a long time. It was only by a chance encounter that the scientists observed the soft and youthful hands of aged sake brewers. The astounding sight of the wrinkled faces of aged sake brewers contrasting their soft youthful hands remained seared in the memories of the SK-II scientists. Back in the confines of the laboratory, they surmised that the secret must lie in the yeast that the brewers' hands were in constant contact with during the sake fermentation process. And that is how an exhaustive research of over 350 yeast strains began. Poring over even the smallest singular detail, the scientists spent over five years isolating the single yeast strain that held the secret to crystal clear skin. It was the birth of a miracle, a beauty revolution that would soon come to be known as PITERA.