salad dressing healthy

Photo: InaTs/istockphoto

4 of 6
Olive or Canola Oil

What's in them: Monounsaturated fats

The belly-fat connection: Adding canola oil to their diets helped people lose 1/4 pound of belly fat in four weeks, according to a study published in Obesity earlier this year. The subjects drank two smoothies per day supplemented with the oil, where the oil accounted for about 18 percent of their daily calories. By the end of the study, their blood pressure and triglyceride levels had dropped too.

More ideas of what to eat: Oils such as olive, peanut, safflower and sesame.