Jamieson Evening Primrose Oil 90 Capsules has a long history of use in North America. It is extracted from the seeds of a wildflower called Primrose. The oil is high in essential fatty acids that cannot be made by the body and have to be obtained through alternate sources. A healthy balance of essential fatty acids is necessary for normal development of the human brain and body. Jamieson Evening Primrose Oil is made using the purest and most premium cold-pressed oil and is fortified with the powerful antioxidant Vitamin E that is essential for the maintenance of good health.