Used as a stable isotopic tracer in metabolic studies to track biochemical pathways in living organisms. Commonly employed in nuclear magnetic resonance (NMR) spectroscopy for structural analysis of organic compounds and biomolecules due to its favorable magnetic properties. Applied in breath tests for medical diagnostics, such as detecting Helicobacter pylori infection. Utilized in isotopic labeling for environmental studies to trace carbon flow in ecosystems. Also used in pharmaceutical research to study drug metabolism without radioactive risk.