Theaflavin is widely used in the food and beverage industry as a natural colorant and flavor enhancer, particularly in tea-based products. Its antioxidant properties make it a valuable ingredient in dietary supplements aimed at promoting cardiovascular health and reducing oxidative stress. In skincare, theaflavin is incorporated into anti-aging and brightening formulations due to its ability to neutralize free radicals and improve skin elasticity. Additionally, it is being studied for its potential role in supporting metabolic health and weight management. Its anti-inflammatory effects also make it a candidate for use in functional foods and nutraceuticals targeting chronic inflammation-related conditions.