Eat it: Sprinkled with cinnamon for a sweet treat or with chili powder for a spicy one.
Parmesan: Women who eat a daily serving of whole-milk products, such as most cheese, tend to weigh less than those who always opt for fat-free dairy, studies show. Experts credit the conjugated linoleic acid in whole-milk dairy. Scientists say that CLA might help the body maintain more muscle mass, helping people burn more calories. Bonus: This cheese's sharp flavor means you don't need a lot of it to feel satisfied.
Eat it: Sprinkled over roasted vegetables.
Chili peppers: These spicy veggies contain capsaicin, a compound unique to chiles that has been shown to boost metabolism.
Eat them: Chopped and sautéed (cooked chiles tend to be gentler on the palate) and added to tacos, stews and salsas.