Flaxseed Oil 1000mg Capsules contain Flaxseed Oil, which is a rich, natural source of omega-3, 6 & 9. Flaxseed Oil is one of the richest sources of the essential fatty acid omega-3 alpha-linolenic acid (ALA). ALA is converted to eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) in the body, which are essential fatty acids that help support brain function.