Since 1947 Cold Pressed Source of GLA Gluten, Wheat & Dairy Free Dietary Supplement Evening Primrose Oil is one of the richest sources of the unsaturated fatty acid Gamma-Linolenic Acid (GLA) and helps to provide nutritional support for women with PMS. It also promotes healthy functioning of the skin, nervous system, and cardiovascular system. This formulation provides premium quality primrose oil, cold pressed without the use of chemical solvents.