Used as a stable isotope-labeled tracer in metabolic studies to investigate fatty acid metabolism, particularly in research involving gut health and energy utilization in cells. Helps track the metabolic fate of butyrate in biological systems, including its role in histone deacetylase inhibition and gene expression regulation. Commonly applied in isotopic labeling experiments in cancer research, immunology, and microbiome studies to distinguish endogenous from exogenous butyrate pools. Suitable for use in cell culture, animal models, and clinical research where precise tracking of metabolic pathways is required.