Cold Pressed.
Gamma-linolenic acid, or GLA, and linoleic acid are essential, polyunsaturated fatty acids. Source Naturals Evening Primrose Oil Hexane Free 500 mg - 180 Softgels They are used by most cells in the body to produce soothing prostaglandins (intracellular hormone-like messengers), which help maintain the balance of many functions in the body..