Evening Primrose Oil Is Made From The Seeds Of A Flowering Plant Native To North America. Evening Primrose Oil Is A Rich Source Of Gamma-Linolenic Acid (Gla). Gla Cannot Be Produced By The Body, So We Must Consume Enough Gla Within Our Diet Or Aid Gla Intake Through Supplementation. Gla Is Converted Into Prostaglandin, A Hormone-Like Substance Which Has Been Believed To Provide Numerous Health Benefits. Evening Primrose Oil Contains Added Vitamin E, Which Is A Powerful Antioxidant That Provides Protection Of Cells From Oxidative Stress.