The Grapefruit Diet is one of the best diets to lose weight quickly. It promises to drop 10 pounds in less than 2 weeks. This diet is low in calories and low in fat and it requires you to cut out carbohydrates. You are not allowed to eat sweet fruits, potatoes, white onions, celery, cereal, peas, corn or other starchy vegetables, grains and cereals, pasta, potato chips, corn chips, celery, low fat salad dressing, peanut butter, jam, or pretzels. You are allowed to consume red onions, broccoli, bell peppers, radishes, carrots, spinach, lettuce, cucumbers, tomatoes, cabbage, green beans, fish, lean meats, chicken, bacon, pork chops, no-bean chili, mayonnaise, cheese, coleslaw, squash, eggs, regular salad dressing, dried nuts, and hot dogs. Food combinations play an important role in this diet. The diet creators claim that the right combination of recommended foods can help burn off excess body fat quickly and without much effort. In addition to this, you should never eat between meals. The goal is to eat until you are perfectly full or satisfied as this will prevent you from feeling hungry later on in the day. During this diet, grapefruit or grapefruit juice is consumed at every meal. Grapefruit is necessary because it contains a fat-burning enzyme that helps the body use fat for energy. That’s why this diet allows some of the foods that are high in fat and protein. For best results, the Grapefruit Diet should be followed for 12 days. If you wish to continue, you must wait 2 days before starting again.