Brief introduction:
Astaxanthin is a ketone carotenoid, chemical named 3,3 ′ -dihydroxy-4,4 ′ -diketo- β, β ′ -carotene, red solid powder, fat-soluble, insoluble in water, soluble in organic solvents. It is widely found in the biological world, especially in the feathers of aquatic animals such as shrimp, crab, fish and birds, playing a color-rendering role.