Green tea is a nutritional staple in Japan where it has been used for centuries. Green tea contains beneficial flavonoids, which are natural phytochemicals that provide antioxidant support and beneficial properties.* Nature's Bounty Green Tea Standardized Extract contains naturally occurring polyphenols. Green tea has been a valued healthful tonic for more than 4,000 years and has been traditionally used to support heart health. Nature's Bounty Green Tea Extract is Non-GMO and Gluten-Free.