Yes, those pretzels are lower in calories than a bag of chips, but in addition to being low in fat and calories, pretzels are also low in vitamins and nutrients -- they have little nutritional value. And that tea? If it's sweetened, it may be just as bad for you when it comes to sugar as soda. For some of us, the idea we're leading an unhealthy lifestyle may come as a surprise.

Eighty percent of Americans think their fellow Americans lead an unhealthy lifestyle, although 85 percent say they live healthy [source: American Public Health Association]. Only three percent of Americans follow the steps that define a healthy lifestyle, according to a study published in the Archives of Internal Medicine. Those include: not smoking, maintaining a healthy weight, getting regular exercise and eating a healthy diet [source: Oswald].