Boost your metabolism and fight off unwanted fat cells with the power of tea extracts. Total antioxidant support for the whole body. Green Tea Hx contains both Green and Black Tea extracts to. The major active compound EGCG, or Epigallocatechin Gallate, is a powerful anti-aging phytonutrient that has been the subject of extensive scientific research along with the theaflavins from black tea. Black tea is oxidized from the same plant as Green tea and also contains powerful antioxidants, including polyphenols.