Could you tell me how much green tea should you drink to lose weight?

When hungry, thirsty: Drinking green tea (choose one that contains no sugar and little or no caffeine) can help with weight loss if it is substituting for other drinks that contain calories. Drinking green tea before each meal can also fill up the stomach somewhat, and make a person satisfied with a smaller meal. If substituting green tea for non-fat milk, one would need another source for vitamin d and calcium.

3-5 cup per day : 3-5 cup help loose 70 calorie per day roughly 7 lbs per year - not effective for weight loss but helps stay healthy, helps thyroid, detox from radiation and chemicals and prevents cancer.

No magic amount: There's no magic amount that you need to drink in order to lose weight. It is a healthful method of including fluids and to that extent it is valuable.

Not clearly : Established at this time. The linus pauling institute reported a study that suggest extracts from green tea can act as a plant-based alternative for glycemic control.