We all know the difference between healthy and unhealthy foods. Some things never change: Broccoli will always be better for you than ice cream. But there are some things you probably don't know. After all, what's one little can of tomato soup? That's why the Center for Science in the Public Interest made a list of the 10 Worst and Best Foods for your health. Because half a can of that soup is more than half of your daily quota of salt.