Krill oil is a rich oil made from a species of krill [Euphausia superba]. Three of the most important nutrients that make krill oil so special are: (1) omega-3 fatty acids with EPA & DHA, (2) omega-3 fatty acids attached (conjugated) to phospholipids, mainly phosphatidylcholine, (3) astaxanthin, a very potent antioxidant.Alta Care Laboratoires presents the krill oil in liquid capsules to conserve to the maximum benefits of the omega 3, phospholipids and the antioxidant effect of krill oil. Cardiosteroil krill oil is more biovailable because of the liquid capsules. Cardiosteroil krill oil in liquid hard capsules are more stable than krill oil presented in soft gels because unlike the softgel capsules the hard capsule is not porous.