Astaxanthin, 3,3 '-2 hydroxyl -4, 4' - diketone - beta, beta - beta-carotene, unsaturated compound of terpene, C40H52O4. It is widely found in the natural world, such as most crustaceans and salmon fish, whose leaves, flowers, fruit, and flamingo feathers are medium. Rain raw red found is the highest astaxanthin content of micro algae, are all known astaxanthin accumulation of synthetic biology's highest species, is recognized as the best biological production of natural shrimp green element in the nature. Astaxanthin has many physiological functions, such as oxidation resistance, is so far found in nature the strongest antioxidant, has been hailed as the "VE", its antioxidant activity is equivalent to 1000 times the natural VE; 10 times beta carotene. Astaxanthin is widely used in cosmetics and skin care products because of its strong antioxidant function. As a compound functional additive widely used in health products, food or beverage industry; As a natural coloring agent for aquatic, meat and poultry eggs and food coloring.