Evening primrose oil (EPO) is a natural dietary supplement extracted from the seeds of the Oenothera biennis plant, a wildflower native to North America. It is highly valued for its exceptional concentrations of Gamma-Linolenic Acid (GLA) and Linoleic Acid (LA), which are crucial omega-6 essential fatty acids that the human body cannot synthesize on its own. While widely popular for managing women's hormonal health and inflammatory issues, medical bodies like the National Center for Complementary and Integrative Health (NCCIH) note that large-scale clinical evidence remains inconclusive for treating specific medical conditions.