A source of omega-3 essential fatty acids, krill oil delivers EPA and DHA. Krill is a crustacean similar to shrimp that lives in the ocean. In addition to EPA and DHA, krill oil is also a source of phospholipids and antioxidants, including astaxanthin. Cardiovascular health, mental health, skin and symptoms of PMS all benefit from krill oil. Swanson EFAs 100% Pure Krill Oil is made from Superba™ Krill Oil, a high-quality, bioavailable krill oil.