Dihomo-γ-Linolenic Acid-d6 (DGLA-d6) is primarily used in research and analytical studies as a stable isotope-labeled internal standard. It plays a crucial role in the quantification and analysis of its non-labeled counterpart, DGLA, in biological samples. This application is particularly valuable in lipidomics and metabolic studies, where precise measurement of fatty acids is essential. By incorporating DGLA-d6 into experimental protocols, researchers can ensure accurate and reliable data when investigating lipid metabolism, inflammation pathways, and the role of DGLA in various physiological processes. Its use enhances the precision of mass spectrometry-based analyses, making it a critical tool in advancing our understanding of fatty acid biochemistry and related health implications.