While the link between calcium and weight loss is still feeble (in some studies it promotes greater weight loss, in others it's a wash), it turns out that milk may really do a body good when it comes to belly fat. A 2010 study by researchers at the University of Alabama at Birmingham found that, among a group of more than 100 premenopausal women, fat was significantly reduced in those who consumed the most calcium-rich foods. In fact, for every 100 milligrams of calcium they consumed per day (that's 1/2 cup of soft-serve frozen yogurt), they lost an inch of intra-abdominal fat—that's the really bad stuff tucked in and around your internal organs that has been linked to higher rates of heart disease and cancer. Like magnesium, calcium can also help you sleep if you tend to be awakened by muscle soreness or cramps—the mineral, along with calcium, helps relax muscle nerves and fibers.

How to get your dose: Dairy works, but there are other ways to get your calcium in as well, such as sardines, fortified orange juice, tofu, and dark leafy greens like kale and spinach.