Bluebonnet’s Evening Primrose Oil 1300 mg Softgels contain an oil from the seed of the evening primrose plant. This oil is squeezed by a process known as cold pressing, thus providing essential fatty acids including GLA. No heat, solvents or chemicals (i.e., hexane free) are used in the extraction process. Available in easy-to-swallow softgels for maximum assimilation and absorption.