Source Naturals Evening Primrose Oil 500mg, Hexane-Free Excellent Source of Important Fatty Acids,180 Softgels Package Quantity:1 Cold pressed. Hexane-free. 500 mg (GLA Yield: 50 mg).Gamma- linolenic acid, or GLA, and linoleic acid are essential polyunsaturated fatty acids. They are used by most cells in the body to produce soothing prostaglandins. Features: Hexane Free contains 500 mg Gamma-linolenic acid or GLA, and linoleic acid are essential, polyunsaturated fatty acids Used by most cells in the body to produce the soothing prostaglandins intracellular hormone-like messengers Help maintain the balance of many functions in the body 135 mg GLA per capsule Product Details: Item Weight: 5.6 ounces Shipping Weight: 6.4 ounces Domestic Shipping: Currently, item can be shipped only within the U.S. and to APO/FPO addresses. For APO/FPO shipments, please check with the manufacturer regarding warranty and support issues. International Shipping: This item is not eligible for international shipping. Learn More UPC: 021078009085 Item model number: SN0908