Natural astaxanthin is a highly oxidative carotenoid, which has the functions of anti-oxidation, anti-aging, anti-tumor, and prevention of cardiovascular and cerebrovascular diseases. It has been used in health food, high-end cosmetics, pharmaceuticals and other fields internationally middle. Astaxanthin itself is not stable, easy to oxidize, and easy to decompose when exposed to light. Most of the astaxanthin on the market retains its activity in the form of gel.