Not too young for the potentially dangerous jobs. what some states are trying to do to roll back the child labor laws. next. and plus, a new formula for maximizing the health. it is called the five-a-day challenge, and here is dr. sanjay gupta with "changing lives." hey, there, i'm dr. sanjay gupta with the changing lives. this is a number to keep in mind -- five. turns out that five is the magic number, three servings of fruit, and two servings of vegetables to live a longer life. the american heart association found out that eating five servings have a day helped to avoid the most chroni...