Evening Primrose Oil is an essential fatty acid supplement that contains gamma-linolenic acid (GLA),and linoleic acid. These essential fatty acids assist the body in producing prostaglandins. Prostaglandins are a group of hormone-like lipid compounds that are derived enzymatically from fatty acids and have important functions in the body. Each Preservative-Free soft gel capsule provides 45mg of GLA and 300mg of Linoleic acid, together with 10mg of Vitamin E. Vitamin E is an antioxidant vitamin which contributes to the protection of cells from oxidative stress, and protects DNA, proteins and lipids from oxidative damage. The antioxidant properties of vitamin E in this formula protect the evening primrose oil from oxidative damage. Other beneficial fatty acids in this formula include oleic acid, palmitic acid, and stearic acid.