Natural astaxanthin also known as astacin, is a kind of precious health ingredients, is used for development to enhance immunity, anti-oxidation, anti-inflammatory, eyes and brain health, regulating blood lipids and other natural and healthy products. At present, the main used as a raw material for human health food and medicine; aquaculture (currently the main salmon, trout and salmon), poultry feed additive and additives of cosmetics.It can significantly improve the body's immunity, because of its non-specific combination with skeletal muscle, can effectively remove the free radicals which are generated by the movement of the muscle cells, strengthen aerobic metabolism, so it has a significant anti fatigue effect.It is only the carotenoids through blood brain barrier, with true anti-aging effect and effective antioxidant is the basis of all beauty activities. Owing to its powerful antioxidant, It can effectively wrinkle anti-aging, sunscreen whitening and except for chloasma caused by age. In the prevention and treatment for age related macular degeneration and improvement of retinal function, it has good effects. All of the above can clearly be confirmed in the United States.The stability and antioxidant activity of synthetic astaxanthin also are lower than natural astaxanthin. Because of the hydroxyl (-OH) at ends of the molecule, astaxanthin can be esterification, resulting in not the same of its stability. More than 90% of natural astaxanthin is exist in ester form, and therefore more stable. Synthesic astaxanthin is the free state, therefore, the stability is not the same, must be embedded in order to stabilize. Because Left lateral structure of synthesic astaxanthin was only about 1/4, so it is only natural antioxidant of 1/4.