SK-II is a Japanese luxury skincare brand, founded in 1980 by Max Factor Japan. The brand is best known for its signature ingredient, Pitera, a naturally-derived byproduct of the fermentation process of sake. Pitera is believed to have significant anti-aging and skin brightening properties, and is a key ingredient in many of SK-II’s skincare products. The brand’s products are designed to address a wide range of skincare concerns, including uneven texture, dehydration, and fine lines and wrinkles. Some of SK-II’s best-known products include the Facial Treatment Essence, the R.N.A. Power Cream, and the GenOptics Aura Essence. The brand has a loyal following among skincare enthusiasts, celebrities, and beauty editors, and is widely regarded as one of the most effective and innovative luxury skincare brands in the world.