Stubborn Fat Metabolizer formula includes green tea extract and a blend of targeted nutrients that, when used with a reduced-calorie diet and exercise plan, increase calorie burning due to the ingredients of EGCG and caffeine that have properties to enhance your metabolism and help burn calories. Stubborn fat metabolizer stimulates Thermogenesis, due to the green tea extract and natural caffeine, which has been shown in human research to stimulate thermogenesis and promote fat burning (fat oxidation). Stubborn fat metabolizer also supports the metabolism due to the Chromium Picolinate ingredients as it is an essential nutrient required for fat, sugar and carbohydrate metabolism. For optimum results, use in conjunction with a reduced-calorie diet and exercise plan.