Dietary Supplement Omega 3-6-9 Super Value Support for Heart and Cardiovascular Health Guaranteed Quality Laboratory Tested Flaxseed Oil-1000 mg Flaxseed Oil, derived from the flax plant, is one of the best sources of Omega-3 fatty acids. Omega-3 fatty acids support heart and cardiovascular health. 21st Century offers the highest quality ingredients produced to strict standards for support of your good health.