Licorice is a plant that is used to treat stomach and mouth ulcers as well as conditions like Addison's disease and arthritis. The roots of the licorice plant are used to make licorice products. Licorice mostly comes from West Asia and is manufactured in countries like China and Pakistan. While licorice has some health benefits, consuming more than 10-20 grams per day can cause side effects like high blood pressure and muscle weakness. Licorice can also interact negatively with certain medications.