NOW Krill Oil 1000 delivers omega-3 EPA and DHA bound to phospholipids, the form your cell membranes are built from, along with naturally occurring astaxanthin, a potent antioxidant that also gives krill oil its red color. Many people find krill oil easier on the stomach with less fishy aftertaste than traditional fish oil. As a shellfish-derived product, it should be avoided by anyone with a shellfish allergy.