Used in biomedical research to quantify levels of apolipoprotein C4 in human serum or plasma samples. Helps in studying lipid metabolism and its association with cardiovascular diseases. Supports investigation into metabolic disorders, including hyperlipidemia and atherosclerosis. Enables researchers to assess the role of APOC4 in lipoprotein regulation and insulin resistance. Commonly used in clinical labs and pharmaceutical research for biomarker validation.