L-Aspartic acid-15N is widely used in research and scientific studies as a stable isotope-labeled compound. It serves as a valuable tool in metabolic pathway analysis, allowing researchers to track and understand biochemical processes in cells and organisms. This labeled form is particularly useful in NMR spectroscopy and mass spectrometry, where it helps in identifying and quantifying metabolic intermediates and products. Additionally, it plays a role in protein synthesis studies, providing insights into amino acid incorporation and turnover rates. Its application extends to medical research, where it aids in investigating diseases related to amino acid metabolism and developing targeted therapies.