Used as a stable isotope-labeled compound in metabolic research and clinical diagnostics, it helps trace and study amino acid metabolism pathways. It is also employed in nuclear magnetic resonance (NMR) spectroscopy and mass spectrometry for precise analysis of protein structures and functions. In pharmaceutical studies, it aids in the development and testing of drugs targeting metabolic disorders. Additionally, it serves as a tool in nutritional research to understand dietary impacts on amino acid utilization in the body.