, a concentrated 500mg green tea extract, with a relevant 250mg of 'active' polyphenols per tablet, convenient one-a-day tablets popular with those on weightloss diets highly rated by nature's best sportthe green tea extract used in this product has been concentrated to ensure a high level of active ingredients called polyphenols (250mg per tablet). these unusual sounding compounds are known to be potent antioxidants substances that are able to neutralise excess free radicals. free radicals are chemicals created in our bodies during metabolism or as a result of sun damage or from inhaled pollution & in excess can damage cells & the dna in cells. green tea has also become a popular choice for slimmers who can include it as part of their calorie controlled diet.to ensure the very best quality & a high level of active ingredients the extract is obtained from whole green tea leaves harvested young & without the leaves being fermented (the process that turns green tea in to black tea). just one of these tablets is equivalent to ½ litre of traditionally brewed green tea but with a caffeine content a fraction of normal tea.