Used as a labeled compound in metabolic studies to trace the pathways and mechanisms of butyric acid in biological systems. It is particularly valuable in research involving the gut microbiome, where butyric acid plays a critical role in maintaining intestinal health. The carbon-13 label allows for precise tracking using techniques like NMR spectroscopy or mass spectrometry. It is also employed in studies focusing on energy metabolism, as butyric acid is a key short-chain fatty acid involved in cellular energy production. Additionally, it aids in understanding the role of butyric acid in anti-inflammatory and anti-cancer research, providing insights into its therapeutic potential.