Evening primrose oil is most commonly used to alleviate menopausal symptoms, thanks to the essential fatty acid, gamma-linolenic acid, which is involved in the production of prostaglandins, a hormone type substance. Evening primrose oil boosts the production of prostaglandins, which helps to counter hormonal changes. For the same reason it is frequently used to balance pre-menstrual symptoms such as water retention, mood swings and breast tenderness. This botanical is also sometimes used in remedies designed to sooth arthritis. Its essential fatty acids can help to calm inflammation and is said to help ease stiffness and minimise pain. Skin care creams containing evening primrose oil can be particularly useful to ease itchy and dry skin. The oil can also be blended into soap to provide similar relief. Evening primrose oil also contains vitamin E – a powerful antioxidant that helps to protect the skin’s cells from oxidative stress.