Citrus unshiu is a citrus species, commonly known as tangerine or mandarine. One of the distinguishing features of the fruits of C . unshiu is the thin, leathery skin dotted with large and prominent oil. Green tangerine is a premature tangerine which has similar citrus fragrance as tangerine. Green tangerine peel has been used in traditional medicine in Korea, China and Japan. It contains similar chemical components as tangerine, but flavonoid composition is higher than tangerine. It has been reported that green tangerine has more anti-oxidant and anti-inflammatory than mature tangerine.