Today there are several topics that have become glamorous or fashion and one of them is related to overweight, obesity and diet. It seems that all people are on a diet but also seems to run anybody or at least that there are few people that they can lose weight and maintain a weight appropriate over time. Why is it this? Probably the correct answer to that question not nobody knows it, but we have some contributions that do that they can help clarify the issue: firstly people fattening do not only once or in a very short time and why one diet lightning taken from a magazine and used to lose a few kilos more and order to adjust in that costume bought for graduation or for the year-end party of year, not will never offer a solution in the medium or long term. If overweight you have has taken ten or more years to get it, don’t wait to get rid of the in a few weeks. Think that the word diet comes from the latin DIETAE which means something that is done every day or something Gets used makes (hence paid public servants a diet daily to attend scheduled meetings, is not that give them to eat, but they pay them) and, then, a diet is not for a certain time but for a long period or even for life. Check out Will Blodgett Fairstead for additional information. Consider for example a person who suffers from diabetes or intolerance even given food and has to carry a special diet. That of not for a short time, is for lifetime. In second term occurs we all have preconceptions with regard to food and nutritional value of food. Many of these ideas come from our childhood and the way of thinking of our parents, especially our mother and that makes us all improper eating habits and we alter the diet programs that give us, even when they are supervised by experts.