Today, frankincense resin is still chewed as gum in Saudi Arabia and used as incense by many churches worldwide. It is also turned into essential oil for use in cosmetics, perfumes, and aromatherapy. Additionally, frankincense has a number of medical applications. Boswellic acid, a constituent of the resin, is used as an anti-inflammatory agent to treat arthritis. The essential oil has anti-aging properties and a number of studies have suggested that it may kill cancer cells.