NOW��® Super Primrose Oil is a high potency Evening Primrose supplement that contains almost three times the GLA content of our regular Evening Primrose Oil. Evening Primrose Oil is an oil containing 84% polyunsaturated fats. Linoleic Acid and Gamma Linolenic Acid (GLA) are Omega-6 essential fatty acids. Although the body can manufacture GLA from dietary linoleic acid, it can be more efficiently utilized for body functions when supplied directly by dietary sources.