Intrepid scientists discovered SK-II's transformative ingredient at a sake brewery 20 years ago, noticing that even though the workers' faces showed the signs of time, their hands seemed to be dipped in a veritable fountain of youth. Now known as Pitera, this nutrient-rich ingredient is found in every SK-II product, and leads to clearer-looking, smoother skin with continued use. 'Sake' it to us!