Drink boiled water for three days, then eat a meal, not too full, just half full, then drink boiled water for three days, eat half full rice, and then do the same thing, you can lose weight. Don't eat anything else in the meantime. If you are hungry, drink a glass of skim milk instead of fruit. If you insist, you will lose 10 kg after 9 days.

PS: This method can't be used often. And you lose weight quickly and rebound quickly. Stick to losing weight.