Some of the healthiest food at the supermarket:

Grass Fed Beef - It's pricier than regular beef, but the health perks make it worth the splurge. Compared with grain-fed beef, grass-fed packs twice the concentration of vitamin E, an antioxidant that protects cells from damage that can lead to chronic diseases.

Omega-3 Fortified Eggs -  They all have the nutrients of regular eggs, plus up to 300 mg or so of the heart-protective fatty acids in each one.

Organic Milk - A recent study from the United Kingdom found that organically raised cows produce milk with higher levels of antioxidants and fatty acids such as CLAs and omega-3s--thanks to all the grass and clover they consume.

Spinach - Rich in iron, which helps deliver oxygen to your cells to keep you alert and energized. And research from the Massachusetts Eye and Ear Infirmary links eating antioxidant-rich spinach with a lower risk of age-related macular degeneration.

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