L-octanoylcarnitine is primarily used in research related to metabolic studies, particularly in understanding fatty acid metabolism and energy production. It serves as a biomarker for identifying disorders in carnitine metabolism, such as carnitine palmitoyltransferase deficiency. In clinical settings, it aids in diagnosing and monitoring conditions linked to impaired fatty acid oxidation. Additionally, it is utilized in studies exploring mitochondrial function and its role in cellular energy processes. Its applications extend to pharmacological research, where it helps in developing therapies for metabolic and mitochondrial diseases.