Teas' Tea Pure Green Tea is authentically brewed. The meticulous brewing methods excel at drawing out from the leaves their naturally occurring health benefits to create a bottle of tea that is natural, healthy, safe, well-designed and delicious. Teas' Tea Pure Green Tea contains catechins/EGCG, powerful antioxidants that help maintain a healthy heart and neutralize free radicals. Teas' Tea Pure Green Tea contains approximately 1/3 the amount of caffeine found in coffee (may vary with brewing strength). It also contains theanine, an amino acid, which studies suggest may provide a sense of relaxation and well-being.