Solgar Evening Primrose Oil 1300 mg is a natural source of gamma-linolenic acid (GLA) drawn from evening primrose, a North American plant with bright yellow blossoms that open at dusk. The positive effects commonly linked to evening primrose oil come from its omega-6 fatty acid GLA, which participates in several bodily functions. The oil is pressed from the seeds of Oenothera biennis, providing a rich supply of omega-6 polyunsaturated fats. Solgar Evening Primrose Oil 1,300 mg delivers a natural source of essential omega-6 fatty acids in easy-to-swallow softgels. The capsules are gluten-free, wheat-free, and dairy-free. A premium, cold-pressed evening primrose oil, produced without chemical solvents and recognized as one of the richest natural sources of GLA, delivered in convenient gluten- and dairy-free soft capsules.