Used in biomedical research to detect and quantify Pepsinogen C levels in human serum, plasma, or tissue samples. Helps assess gastric function and diagnose gastrointestinal disorders such as atrophic gastritis, gastric cancer, and Helicobacter pylori infection. Widely applied in clinical laboratories and research settings for biomarker analysis due to its high sensitivity and specificity. Supports large-scale screening studies and monitoring of disease progression or treatment response.