Gamma-linolenic acid (GLA), a metabolite of linoleic acid, is a critically important fatty acid and friendly prostaglandin precursor, the endogenous production of which is blocked in many diseases and by the aging process itself. Credible research has concluded that GLA helps preserve comfortable joint function, helps to normalize hormonal effects on breast tissue, and supports optimal nerve function in the distal extremities. Karuna GLA-240 is 100% pure borage seed oil, organically grown and cold-processed to prevent oxidation and preserve potency. Borage oil has 1.5 times more GLA than Black Currant oil and almost 3 times more than Evening Primrose oil. The Karuna product is hexane-free - no solvents are used in processing.