Evening Primrose Oil is a rich source of the essential fatty acids (EFAs) which are believed to help maintain normal cell growth, hormonal balance and healthy skin. Evening Primrose Oil is rich in the essential Gamma Linoleic Acid (GLA) which is an omega 6 fatty acid involved in the production of prostaglandins. Prostaglandins are thought to play key roles in helping to regulate blood pressure and hormonal balance. The body does not produce Essential Fatty Acids (EFAs) and therefore they must be obtained through our diet. Simply Supplement's nutritionists recommend you take up to 3 capsules per day to gain optimal levels. Evening Primrose Oil 500mg is one of Simply Supplements all-time best selling products, particularly popular amongst our female customers suffering from hormonal imbalances.