Kiehl's Blue Herbal Spot Treatment

"Cosmetically elegant," says dermatologist Min-Wei Christine Lee of Walnut Creek, Calif., of this fast-acting, blemish-fighting gel, inspired by the company's classic Blue astringent. "Salicylic acid and glycolic acid help treat acne," she says, "while herbal ingredients [such as cinnamon bark and ginger root] calm the skin."