Oil seeds, plant infusion and the root are used as a dietary supplement.It contains 14% of essential oil that is rich in cis-linolenic acid (70%) and gamma-linoleic acid (GLA) (10%), both precursors of prostaglandins. It is also rich in palmitic (10%) and stearic acids (10%).Attributed properties: anti-inflammatory, antioxidant, platelet antiaggregant activity. Indications by the Commission E of the German Health Ministry: non.Effectiveness is still under debate on atopic dermatitis, premenstrual syndrome, mastalgia, multiple sclerosis, psychiatric diseases and rheumatic diseases.Also, its effectiveness as an inducer of childbirth is unclear. The cis-linoleic acid and gamma are natural constituents of human milk.The administration of evening primrose oil for months to nursing mothers, increases the levels of fatty acids in milk without adverse effects in either the mother or infant.Moreover, administration of GLA to mothers does not prevent the appearance of atopic dermatitis in infants. Given the lack of toxicity, moderate consumption during lactation is considered of little or no risk. The total concentration of fat and linoleic acid in banked milk is decreased due to pasteurization and freezing.