Nordic Naturals Omega 3D 690 mg Omega 3 + 1000 IU D3 provides with the omega-3s and also vitamin D3 which the body needs to stay healthy. Omega-3D soft gels give you a convenient way to get healthy amounts of both of these essential nutrients on a daily basis. Omega-D3 adds 1000 IU vitamin D3 (cholecalciferol), the form of vitamin D your body makes naturally from sunlight, to this formula. So you get all the health benefits of omega-3 EPA+DHA plus all the bone-building and immune-strengthening support of vitamin D, in one great-tasting serving.