2. However, it should be noted that this lipolytic factor has a certain test on human tolerance. Don't take too much, otherwise it will easily have adverse effects on the human body. Excessive drinking of coffee can cause abdominal pain, diarrhea, dizziness, fatigue and other adverse symptoms. Coffee also contains dietary fiber. Drinking coffee in moderation can make people feel full, thus reducing the intake of other calorie foods and helping people lose weight. However, if the stomach is not good and the blood is deficient, it is not recommended to drink American coffee to lose weight, otherwise it will easily lead to gastrointestinal diseases.