Why We Keep Being Hungry

Regardless of whether a person is or is not "full", the body is programd to be rewarded for eating more when he is tempted with tasty food. According to a study conducted by the Department of Psychiatry of the University SUN of Naples (Italy), published in the Journal of Clinical Endocrinology & metabolism.
In this process is involved a hormone (ghrelin) produced in the stomach, which regulates the reward and motivation, and a compound (2-AG) related to the appetite.
Our agency is scheduled to be filled in case then the food shortage. When this condition is coupled with an environment in which food is cheap, is available and often provides in large portions all goes against, and not to eat in excess it becomes very hard.
The concept of "eating for fun", instead of eating to survive (hunger homeostatic) is relatively new. To explore how the traditional hunger is reflected today, the study (very small) analyzed the behavior of five women and three healthy men 21 to 33 years. None of the participants were overweight or obese was, and all were free from any problem in the eating behavior.
Each one took part in two tests with an interval of one month. On both occasions, the participants first ate a breakfast of 300 calories, and after lunch rated their level of hunger. After an hour, was offered to each one his favorite meal, a meal that would eat even after you feel full. During five minutes were only allowed to see or smell your favorite meal, during that period were asked describe how much hunger had, what was your impetus to eat and how much they thought eat. The second test was similar, except that this time the participants were provided with a article unappealing (bread, milk and butter) but containing the same nutrients and calories your favorite meal.
The result was that despite a feeling of satiety after the breakfast, participants said that their momentum to eat and the amount that they thought eat were significantly higher before its favorite food before the food unappetizing.
In addition, blood tests revealed that when participants ate his favorite food, the blood levels of the hormone of motivation (ghrelin) increased and remained high for up to two hours. In contrast, the levels dropped after eating the article unappealing. The levels of the compound related to the appetite (2-AG) was reduced after eating both the favorite meal as the unappetizing. However, they remained much higher see and eat the favorite food.