Evening Primrose Oil is one of the richest sources of Gamma Linolenic Acid (GLA), an essential fatty acid that provides the building blocks for female hormones. It thereby helps to provide hormonal balance. It plays a key role in female metabolism by maintaining hormonal balance, healthy skin and supple joints. Pre-Menstrual Syndrome and Menopause: Evening primrose oil helps support hormonal balance and has been found to be effective at reducing menstrual cramping, bloat, water retention, breast tenderness and irritability due to hormonal shifts during a women's cycle