Natures Aid Evening Primrose Oil 1000 mg is a rich, natural source of Omega 6. Omega 6 is an essential fatty acid, which means it is needed by the body but cannot be produced by it, so must be consumed in the diet or via supplements. Each capsule provided 1000 mg evening primrose oil, containing 80 mg of the Omega 6 Gamma Linolenic Acid (GLA). The oil is cold-pressed, to help maintain its integrity and preserve its valuable components during processing. Available in packs of 90 and 180 softgel capsules.