Evening Primrose Oil Unrefined Cold Pressed Firstly, Unrefined Cold Pressed Evening Primrose Oil product is Unrefined, which means it is in the purest form that it can possibly be in. Moreover, the Native Americans and European settlers used primrose, a wildflower that grows in eastern and central North America. The name originates from the yellow blossoms that only bloom in the evening. Our Evening Primrose oil has gamma-linolenic acid (GLA), an omega-6 fatty acid that has many beneficial properties for both skin and hair. Furthermore, the seeds of the flower gathers and cold pressed for their oil. Carrier Oils Have Many different uses, one of their most common uses is to dilute essential oils. Moreover, consider adding to our oil by pairing it up with a buttercream for better results. Like other substances that are high in fat, carrier oils have a limited shelf life.