Astaxanthin is a carotenoid end. Without modification or biochemical conversion, it can enter into the animal body and directly be stored in the organization. So that the skin and muscle of some aquatic animals show healthy and bright colors which make eggs and poultry feathers, skin and feet show the health golden yellow or red color. Β-carotene can be converted to astaxanthin in the body of shellfish. But most of them become vitamin A with less effective coloring effects. And it does not have the function of coloring in common aquatic animals and birds. Only oxygenated derivatives of carotenoids have the function of coloring on egg yolk. And coloring capacities of dihydroxy and dione-based carotenoid is stronger than the single hydroxyl, single-keto or epoxy carrots hormone on egg yolk.

Astaxanthin is an excellent antioxidant. The capacity to promote antibody production, enhance the animal's immune function, antioxidant, eliminating free radicals are stronger than beta-carotene. Astaxanthin these features contribute to improved survival and health status of individual animals. Studies have shown that in the horn shrimp feed, add the 50mg/kg shrimp infertility factors can significantly improve the survival rate of shrimp, weight gain and feed conversion ratio.

Astaxanthin has a very important role on fish growth and reproduction. Astaxanthin as a hormone can promote eggs fertilized, reduce the mortality of embryos, promote individual growth and increase maturation speed and fertility. This fish is rich in nutrients biotin, bright color, tasty, popular favor in the U.S. and European markets, its price than the average fish is many times higher. Therefore, in the development of Europe and the United States salmon and sturgeon breeding rapidly, the annual demand for astaxanthin production is up to several hundred thousand tons, worth a total of hundreds of millions of dollars. At present, the development of aquaculture in China will soon add astaxanthin production of high-grade aquatic products. The prospects are very broad.

Astaxanthin as the strongest antioxidant vitamins in nature, it has the reputation of the super vitamin E. it is 550 times in antioxidant activity of vitamin E. It can effectively protect the skin from ultraviolet (UVA, UVB) damage in skin by light consumption of putrescine, as a potential light protecting agent used to prevent skin photoaging to prevent induced skin cancer. Its powerful elimination of free radicals to prevent skin cell damage by free radicals, reduce wrinkles and freckles. Astaxanthin has many medicinal and additives for use at this stage as a new cosmetic raw material for its excellent features are widely used in the cream, cream, lip balm, skin care products and other kinds of cosmetics.

With economic development, health concerns, especially the increase in age-related degenerative diseases, people have higher requirements for astaxanthin to improve the ingredients of carotenoid antioxidant and immune functions. As a food ingredient and dietary supplement, it has more and more applications. Tretinoin can significantly inhibit the proliferation of human colorectal carcinoma SW116 cells. It can also inhibit bladder cancer, liver cancer, oral cancer, lung cancer and UV-induced skin cancer. Astaxanthin is easily through the blood-brain barrier and it could be effective in preventing age-related macular degeneration and central nervous system diseases. So it is the first-choice product among elderly health care products. In addition, studies have shown that astaxanthin has a role of weight loss in animal models.Source: