Hello, you can't drink too much coffee. Only black coffee can help you lose weight. Drinking a cup of black coffee in the morning can clear the intestines, and drinking black coffee up to seven times a week. Drinking coffee to lose weight must be combined with exercise. Caffeine will help you break down the fat in your blood and burn it, otherwise it will become fat again. Drinking a lot of coffee can easily lead to insomnia, and coffee has diuretic effect. Drinking a lot of coffee will lead to water shortage, poor skin quality and harm to health.