Citrus flavonoids extracted from citrus fruit out of a series of significant biological activity of flavonoids, citrus flavonoids unique aroma, good water solubility and significant pharmacological effects. Clinical studies have proven that flavonoids are both important pharmacological factor is the nutritional factor, is a new class of nutrients found in the human body mainly depend from vegetables, fruits and cereals and other foods in a certain amount of flavonoid intake, and metabolism of flavonoids in the body Express the need to constantly add, citrus flavonoids specific physiological activity has been recognized worldwide, the market has a large number of flavonoids as a natural dietary supplement made from a variety of health products and food, while cosmetics and medicine products has also been widely used.