Nature's Way Evening Primrose is a maximum strength cold-pressed and unrefined oil. Evening Primrose has been used for centuries by Native Americans for a variety of purposes. Evening Primrose is an essential omega-6 fatty acid which must be obtained in your daily diet and has a wide variety of uses and benefits. Nature's Way Evening Primrose is the highest quality Evening Primrose Oil and guaranteed to contain 120 mg GLA (gamma-linolenic acid) per serving. Nature's Way Evening Primrose contains no chemical solvents, starch or artificial colors.