Evening primrose oil 1300 mg softgels 10 gla cold pressed and hexane free sugar salt and starch free evening primrose oil epo comes from the seeds of the evening primrose plant like black currant seed oil and borage oil epo contains gamma linolenic acid gla a fatty acid that the body converts to a hormonelike substance called prostaglandin e1 pge1evening primrose oil has been used treat breast pain and allergic dermatitis and eczema it has also been advocated for high cholesterol rheuma