Used in food allergy research to detect and quantify β-lactoglobulin, a major allergen in cow’s milk, in various dairy products and processed foods. Helps assess allergen cross-contamination in manufacturing lines and supports development of hypoallergenic dairy alternatives. Also applied in clinical studies to monitor residual β-Lg in infant formulas and evaluate immune responses in milk-allergic individuals. Widely utilized in quality control and food safety testing to ensure compliance with allergen labeling regulations.