Glycine-15N is widely used as a stable isotope tracer in various scientific studies, particularly in metabolic research. It helps in tracking nitrogen pathways within biological systems, providing insights into amino acid metabolism, protein synthesis, and nitrogen utilization in plants, animals, and microorganisms. In medical research, it is employed to study disorders related to amino acid metabolism and to develop diagnostic tools. Additionally, it is utilized in environmental science to understand nitrogen cycling in ecosystems. Its role in nuclear magnetic resonance (NMR) spectroscopy is also significant, enabling detailed structural and functional analysis of biomolecules.