Astaxanthin is a kind of keto carotenoid, chemical name is 3,3'-dihydroxy-4,4'-diketo-β,β'-carotene, red solid powder, fat-soluble, insoluble Water, soluble in organic solvents. It is widely present in the biological world, especially in the feathers of aquatic animals such as shrimps, crabs, fish a......
Read More