American teenagers seem healthy enough but, in fact, many are not. For example, the numbers who do spo or other energetic activities are falling. Even more importantly, more and more young Americans do not eat well.This is a problem. And a large part of the problem is junk food – the junk food that most of us eat more and more. And there’s another big diet problem: too many teens don’t eat when they should. Take Carrie Choi. Carrie is 15 and she hasn’t eaten breakfast since she was in third grade. ‘I don’t have time,’ she says. ‘I have to be on the school bus at 7:15 am. Anyway,’ she adds, ‘I’m really not hungry at that time of day.’ More and more young Americans talk like Carrie. They are the 20% of US teenagers who don’t eat breakfast. They are creating real problems for themselves – and perhaps even killing themselves