DGLA is a metabolite produced by chain elongation of the essential fatty acid γ-linolenic acid. Ethyl DGLA is an esterified version of the free acid which is less water soluble, but more ammenable for the formulation of DGLA-containing diets and dietary supplements. DGLA has been advanced as a possible treatment for various inflammatory disorders. Evening primrose oil is a DGLA-rich nutraceutical which has been advocated for such uses.