Used in research settings to quantify soluble transferrin receptor levels in biological samples such as serum or plasma. This assay helps assess iron status and differentiate between iron deficiency anemia and anemia of chronic disease. Commonly applied in clinical studies, nutritional assessments, and hematological research where accurate evaluation of iron metabolism is required. The kit enables high-throughput analysis with reliable sensitivity and specificity, making it suitable for large-scale population studies and diagnostic development.