10. Olive Oil
This Mediterranean oil, which includes oleic acid, is high in cancer-fighting polyphenols and heart-strengthening monounsaturated fats.
The fact that fat can help you lose weight is backed up by some pretty compelling evidence: An olive-oil-rich diet resulted in higher levels of adiponectin than a high-carb or high-protein diet.
Adiponectin is a hormone that helps the body break down fats, and the more of it you have, the lower your BMI will be. Extra virgin olive oil may increase blood levels of serotonin, a hormone linked to satiety, which is another reason to use it in salad dressings and sauces.
