The nicotine and tar affect the formation of important hormones, that's all it is. This is indicated by the results of scientific work of experts from the University of Athens. The combustion products of tobacco inhibit the synthesis of ghrelin. This hormone is responsible for appetite control. The less ghrelin in the body, the less hungry. That is why smokers rarely complain of hunger.
As soon as the access of nicotine to the body is discontinued, appetite returned to the person. The result is quite often quit gaining your weight a few pounds.
On the hormonal background of a person is influenced by many factors, and Smoking is no exception. Afraid of weight gain after quitting cigarettes is not worth it. It is sufficient simply to adjust the diet and start eating large amounts of fatty foods. From vegetables, fish and meat diet yet no one got fat.