An oil derived from Oenothera biennis, a biennial herb with yellow flowers, that contains omega-6 fatty acids. It is promoted for the treatment of inflammatory conditions (e.g., of the skin or joints).
Evening Primrose Oil is derived from the seeds of the Oenothera Biennis plant, more commonly known as Evening Primrose. The oil harbors an anti-inflammatory compound named gamolenic acid. Some believe this substance is beneficial for managing conditions like eczema and premenstrual syndrome.