... -oxidant,Arthritis,eye health,Enhance the Immune Astaxanthin (Haematococcus pluvialis extract) Synonyms: 3,3'-dihydroxy-ß-carotene-4,4'-dione; ... Powder) 2%, 2.5%, 3%, 3.5% Product IntroductionAstaxanthin, a member of the carotenoid family, is an oxygenated red-orange pigment ... . Professor Basil Weedon was the first to map the structure of ...