Krill are shrimp-like crustaceans that occupy a relatively low position on the food chain, feeding on plankton and ice algae.  Antarctic Krill is rich in the antioxidant astaxanthin, which gives the oil its characteristic red color.  Astaxanthin is a natural carotenoid-type of antioxidant that is even more powerful than beta-carotene, alpha-tocopherol, lycopene and lutein.  Astaxanthin