Benefits of Horseradish. Horseradish is a root that is grated or ground to make an interesting condiment. It provides a pungent, spicy flavor to sandwiches and other dishes, and has been used for thousands of years in traditional herbal medicine as a remedy for respiratory and urinary problems.orseradish is also relatively rich in vitamin C, and also provides small amounts of the B vitamins. In addition to these vitamins and minerals, horseradish also contains several phytochemicals, which are responsible for its medicinal properties.