These are simply the powerful antioxidants described above that make up about 30% of the Matcha Green Tea’s dry leaf weight. Because Matcha is unfermented, the polyphenols exist primarily as catechins. The most powerful catechins (antioxidants) are known as ECGg. What this means in layman’s terms is this: 1 cup of Match Green Tea has a much greater antioxidant affect that a serving of broccoli, spinach, Kale, carrots, or strawberries, as well as other green and black tea’s per above.