Used to measure the activity of Carnitine Acylcarnitine Translocase (CACT) in human biological samples such as blood, plasma, or tissue extracts. This kit is primarily applied in clinical and research laboratories to assess mitochondrial fatty acid oxidation disorders. It helps in diagnosing CACT deficiency, a rare genetic condition that can lead to metabolic crises, hypoglycemia, cardiomyopathy, and muscle weakness. The assay supports early detection in newborn screening follow-ups and aids in monitoring disease progression or treatment response. It is also used in metabolic research to study mitochondrial function and lipid metabolism.