BOSTON — Pharmavite is talking up its Nature Made 300-mg Krill Oil supplement, which delivers a combination of omega-3 fatty acids and antioxidants from naturally occurring Astaxanthin — a carotenoid that is found in microalgae, yeast, salmon, trout, krill, shrimp, crayfish and crustaceans. Astaxanthin provides the red color of salmon meat and cooked shellfish.