Tea polyphenols have significant preventive and therapeutic effects on the following diseases: lowering blood pressure, anti-blood clotting, reducing blood lipids, weight loss, lowering blood sugar, preventing and treating diabetes, antibacterial and antiviral effects; preventing and treating gastrointestinal, respiratory, and flu diseases; preventing and treating hepatitis, fatty liver, anti-aging, and enhancing immune function; promoting dental health, preventing and treating periodontitis, preventing tooth decay, deodorizing, and detoxifying.