γ-Linolenic Acid Methyl Ester-d3 is an isotope analog of γ-Linolenic Acid Methyl Ester. γ-Linolenic Acid Methyl Ester is used in analytical studies to increase the separation of isomeric fatty acid methyl esters, triacylglycerols and tocopherols at high pressure with polymeric C18 and C30 stationary phases via reversed-phase liquid chromatography.