It was used traditionally for treating a variety of conditions, including lung, liver, circulatory, and kidney diseases. Today, licorice root is promoted as a dietary supplement for conditions such as digestive problems, menopausal symptoms, cough, and bacterial and viral infections. Natural skin lightener: Licorice root powder is a natural skin lightening alternative to the harsh and damaging chemical bleach as it contains glabridin, which acts as a skin brightening agent.