5. Turmeric. A staple ingredient in Indian cuisine, turmeric is notoriously spicy-and health-enhancing. In addition to its anti-inflammatory properties, which may reduce arthritis symptoms, turmeric's active ingredient, curcumin, helps to burn fat, promote proper metabolism, and corrects bile excesses and deficiencies. Turmeric also aids digestion by breaking down high-protein foods and preventing the formation of gas. The next time you head over to your favorite Indian restaurant, think about all the great metabolism revving you'll be doing once you leave.

6. Mustard. Often when we think of mustard, we think of the not-so-healthy hot dog. Few people realize that the mustard seed is also a great source of omega-3 fatty acids as well as calcium, dietary fiber, iron, manganese, magnesium, niacin, phosphorus, protein, selenium, and zinc. Spicy mustard (not the run-of-the-mill, yellow kind) can also kick your metabolism into high gear. In fact, a researcher from England's Oxford Polytechnic Institute discovered that eating a teaspoon of hot mustard can boost metabolism 20 to 25 percent for several hours after eating, burning about 45 calories if a 700-calorie meal is consumed.

7. Horseradish. Cousin to the mustard plant, horseradish is known as the spicy ingredient in wasabi and a fixture in fiery cocktail sauces. Horseradish also has an amazing ability to dissolve fat in cells and has a cleansing effect on the body. Horseradish stimulates digestion, especially of the fatty foods with which it is often paired.

8. Garlic. Although it may give you halitosis when eaten in large doses, studies show that garlic can help to lower blood pressure and control cholesterol. What's more, its active compound allicin has anti-bacterial effects. As if that weren't reason enough to buy a few bulbs, garlic has been shown to reduce unhealthy fats and jump-start weight loss.