Stearoylcarnitine plays a crucial role in cellular energy metabolism by facilitating the transport of long-chain fatty acids into the mitochondria, where they undergo beta-oxidation to produce energy. This process is vital for maintaining energy balance in tissues with high energy demands, such as skeletal and cardiac muscles. It is also used in research to study metabolic disorders, particularly those related to fatty acid oxidation defects, such as carnitine palmitoyltransferase II (CPT II) deficiency. Additionally, stearoylcarnitine serves as a biomarker in clinical diagnostics to assess metabolic health and identify abnormalities in lipid metabolism. Its applications extend to investigating the impact of lipid metabolism on conditions like obesity, diabetes, and cardiovascular diseases.