Cellular Protection Potent Free Radical Scavenger Antioxidant Power of Vitamin C A Dietary Supplement Vegetarian/Vegan Botanicals/Herbs Family Owned Since 1968 GMP Quality Assured NOW Green Tea Extract offers a convenient way to obtain the active constituents of Green Tea in a concentrated form. Green Tea Extract (GTE) has numerous bioactive compounds, including Polyphenols and Catechins, which are known for their many health-supporting properties. These compounds have been found to help to maintain a healthy response to normal metabolic stress. Catechins, which are known for their many health-supporting properties. These compounds have been found to help to maintain a healthy response to normal metabolic stress.