The diet is developed by Hitoshi Watanabe who has studied preventative medicine and his wife Sumiko who is a pharmacist by profession.
The default setting “discoverer” of this diet is that breakfast containing only of bananas and water (at room temperature) can contribute to a significant reduction of kilograms, no matter what you eat during the day. The diet is extremely simple and easy to follow, and many Japanese have confirmed its validity: many people lost their excess weight with this experiment.
The answer : why this diet ,,works” so well- is perhaps the fact that bananas encourages digestion and metabolism.
Another option is a type of starch that bananas have, which has a lower glycemic index, long welded, gives a feeling of satiety and partially blocking the absorption of carbohydrates.
No one is sure why the water must be at room temperature, but there are several theories, of which the most common are that the water at room temperature improves digestion and reduces the feeling of hunger.
People who want to practice this diet are advised that the evening meal is before 8 pm and to avoid sweets after dinner. If you are hunger is acceptable to take a piece of fruit.
And the last rule in this diet is : go to sleep before midnight. For this rule is not need explanation because the scientific studies have shown a correlation between late going to bed and obesity.
Prohibited foods are dairy products and alcohol. Of beverages there is only room temperature water. A bananas must be raw, not baked, cooked or frozen.