Krill are tiny crustaceans found in the sea. They are the world's largest biomass and feed the largest animal, the blue whale. Krill oil extracted from Krill is a unique source of phosphatidyl choline bound to EPA and DHA. This combination confers a faster and more effective delivery of EPA and DHA in the body, and specifically to the brain, through better absorption and transport when compared to the normal triglyceride form found in fish oil. The phospholipids in krill oil are also bound to a powerful antioxidant, astaxanthin, known to cross the blood brain barrier.XanthOmega™ krill oil contains exceptionally high levels of both esterfied astaxanthin and phospholipids which account for the dark red color of the softgels. XanthOmega™ also naturally contains several other antioxidants including, canthaxanthin, beta carotene, vitamin E and trans-retinol vitamin A. These antioxidants protect this nutrient dense oil from oxidation. Designs for Health's XanthOmega™ krill oil is made using a unique cold-extraction process that converts it into stable oil. This process protects the lipids from alteration and avoids peroxidation. It is free of heavy metals and organohalide pollutants, making it extremely pure.This product does not cause reflux or regurgitation commonly experienced by those consuming regular fish oil supplements.