The most effective method of addressing this problem is almost certainly to provide better health education in schools. The main reason for this is that young people need to be told at a young age what the long-term effects of a poor diet can be and the most effective forum for this is school. If, for example, a child has lessons on the need for a well-balanced diet in biology classes and does a research project on what types of food provide the best nutrition, then they will almost certainly learn healthy eating habits which will protect them later in life. This is a case where prevention is stronger than cure.