Just by drinking 2 servings of greenteaHAWAII per day for 30 days you will lose 8-10lbs. You drink one 20 minutes before breakfast and one 20 minutes before lunch. You don't have to change your diet or exercise regimen. If you do you will most likely increase the results. How it works is when you drink GTH prior to meals, the antioxidants will break down the waxy coating surrounding the visceral fat/belly fat cells, thereby allowing the body to recognize these fat cells as sources of energy and begin to burn them for energy instead of the body relying on caffeine and sugar for energy. Also, when you eat 20 minutes later, the GTH antioxidants will have blocked lipase sites, the enzyme in our body that makes us store fat, so the fat/cholesterol in your food will have little to stick to.