Gamma-Linolenic Acid (GLA), the active component of evening primrose oil, is an essential fatty acid important for maintaining healthy skin. It does this by supporting the cells moisture content and integrity. GLA also helps maintain normal healthy responses to hormones during a womans monthly cycle.Over 30 years of research has enabled Efamol to develop unique and superior strains of evening primrose, including that from the patented Rigel plant. Efamol has exclusive access to seeds of this unique plant, which yield up to 33% more GLA than others.Efamol Pure Evening Primrose Oil helps support the skin structure ensuring smooth, healthy looking skin. Efamol Pure Evening Primrose Oil is also an effective treatment for the relief of symptoms manage premenstrual tension.,p