Tea : The Chinese LegacyNutritional qualities Taken on its own, tea has no calories. However, when milk is added to it, as enjoyed by 98% of the population, it can provide a number of vitamins and minerals. It has flavonoids and antioxidant powers. These help to provide it with cancer fighting qualities. Flavonoids Green Tea (average/ 100g) Black Tea (average/ 100g) Catechins 14.2 g 4.0 g Theaflavins - 0.94 TOTAL POLYPHENOLS (others included)* 16.0 15.6 Published on Jul 30, 2014Last Updated on May 14, 2020