Trioctanoin-carboxyl-13C3 is primarily used in research and diagnostic applications due to its isotopic labeling with carbon-13. It serves as a valuable tool in metabolic studies, allowing scientists to trace and analyze the pathways and mechanisms of lipid metabolism in biological systems. This compound is particularly useful in nuclear magnetic resonance (NMR) spectroscopy and mass spectrometry, where the labeled carbon atoms provide clear signals for detection and quantification. Additionally, it is employed in clinical studies to investigate disorders related to fat metabolism, such as obesity, diabetes, and cardiovascular diseases. Its stable isotope labeling ensures accurate tracking of metabolic processes without altering the biochemical behavior of the molecule.