Green tea greatness. This proprietary, highly concentrated extract of the antioxidant catechins found naturally in green tea helps promote long-term cellular health and increases your body's metabolic rate via thermogenesis.* One of the most potent green tea extracts on the market. For thousands of years, green tea has been used for its incredible health benefits. Tēgreen 97 harnesses the power of green tea and unleashes its full potential. All with minimal caffeine and improved bioavailability and antioxidant capacity compared to drinking green or black tea.