Botanical Name: Oenothera biennis Extraction Method: Cold Pressed Description: This Evening Primrose Oil is unrefined, and rich in gamma linoleic acid (10%) and omega fatty acids. It is moisturizes the skin and gives it a rejuvenated look. Being an unrefined organic oil, Evening Primrose has retained most of its nutrients which would make it a wonderful addition to cosmetic manufacturing. Color: Yellowish green to deep green liquid.