Widely used as a natural food colorant, especially in beverages, dairy products, and confectionery, due to its vibrant blue to red color that changes with pH. It serves as a marker in analytical chemistry for detecting metal ions and antioxidants because of its strong chromogenic response. Applied in nutraceuticals and dietary supplements for its antioxidant, anti-inflammatory, and potential cardioprotective properties. Investigated for use in biosensors and smart packaging materials that respond to environmental changes like freshness or spoilage in food. Also utilized in cosmetic formulations for its color and skin-protective effects.