Tea is high in polyphenols, which are antioxidants found in many plant products. Green tea contains more polyphenols than black tea.
Research suggests that a diet high in polyphenols may protect against many health conditions, including high blood pressure, some cancers, cardiovascular disease, and type 2 diabetes.
“Tea is very rich in bioactive compounds like polyphenols […] these have the potential to reduce oxidative stress […] that’s the background mechanism.”
– Dr. Inoue-Choi
Black tea contains polyphenols called theaflavins and thearubigins. Studies have shown that theaflavins are powerful antioxidants and may also have anti-inflammatory, anticancer, and antimicrobial properties, helping to control blood lipids.