SK-II

SK-II's origin story begins in the 1970s at a sake brewery in Japan, where scientists noticed that elderly workers had remarkably youthful hands despite aged faces. Research attributed this to the yeast fermentation process, leading to the isolation of Pitera -- a proprietary yeast-derived ingredient (galactomyces ferment filtrate) that contains over 50 micronutrients including vitamins, amino acids, minerals, and organic acids. SK-II launched in 1980 in Japan and has since become one of the most recognized luxury skincare brands globally, particularly in Asian markets. The Facial Treatment Essence, containing over 90% Pitera, is their hero product with a devoted following. Now owned by Procter & Gamble, SK-II maintains its premium Japanese positioning. With 15 products across 9 categories averaging 80/100 at the luxury tier, the brand delivers products with genuine fermentation-science backing, though the single-ingredient focus means the range can feel narrow in its approach.