It's one of the most famous and best-loved brands in the whole world thanks to its innovative formulas that come right out of the lab. RX is a commonly used abbreviation in the pharmaceutical sector and it stands for a prescription. Cosrx designs all of its skin care products to solve a concrete problem skin can experience. Whether or not you're experienced in the world of Korean skin care, take a look at their formulas, benefits and product reviews. They never cease to amaze!