NOW Foods Neptune Krill Oil 500 mg provides omega-3 fatty acids (EPA and DHA) in the unique phospholipid form naturally found in krill — a form that is more bioavailable than the triglyceride omega-3s in standard fish oil. Because krill oil omega-3s are already bound to phospholipids, they integrate into cell membranes more efficiently and don't require the same digestive conversion as fish oil. Neptune Krill Oil also contains astaxanthin, a powerful marine antioxidant that naturally protects the delicate omega-3 fats from oxidation — without needing synthetic antioxidants. Each softgel delivers 500 mg of krill oil with a minimum of 100 mg EPA+DHA, plus 1.5 mg natural astaxanthin. A sustainable, potent, and highly bioavailable alternative to conventional fish oil.