Fast food is harmful because of it fat. And that boys, especially for girls is very bad. Fast food - the culprit of many diseases. Contains murderous for gastrointestinal food. in any case not be accustomed to the fast food for their children. It is terrible to see how families with children aged 3-5 years are marching toward the McDonald's on the "family fast food." Among other things, the abuse of fast food at such a tender age can lead to delays in the development, disorders of the nervous system of the child, weakening of the immune system.