Used extensively in metabolic research and tracer studies to investigate nitrogen metabolism and amino acid pathways in biological systems. It serves as a labeled compound in nuclear magnetic resonance (NMR) spectroscopy and mass spectrometry for precise tracking of metabolic processes. Applied in studies of protein synthesis, cell culture media, and understanding glutamine's role in immune function and gut health. Also utilized in clinical research to explore its therapeutic potential in conditions like muscle wasting, immune deficiencies, and gastrointestinal disorders.