Product Name: Astaxanthin Synonym: 3,3'-Dihydroxy-beta,beta-carotene-4,4'-dione Molecular formula: C40H52O4 Astaxanthin is a carotenoid. It belongs to a larger class of phytochemicals known as terpenes. It is classified as a xanthophyll. Like many carotenoids, it is a colorful, fat/oil-soluble pigment. Astaxanthin, unlike some carotenoids, does not convert to Vitamin A (retinol) in the human body ...