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Fill your cart and stock your shelves with nutrient-rich foods that can add years to your life. Start at the bottom (super important) and work your way to the top (very important) of Dr. Oz's food pyramid. Note: Serving sizes should be about the size of your clenched fist, except for animal proteins, which should be about the size of a deck of cards.

Level 1: Vegetables, 4 servings a day

• Jicama
• Kale
• Sweet Potatoes

Vegetables are the base of Dr. Oz's food pyramid, and the most important tool in fighting every major killer in America: heart disease, hypertension and cancer. Jicama is a slightly sweet and crisp root vegetable that is high in potassium, which helps to reduce high blood pressure. Kale is high in flavonoids, which kills off cancer cells. Sweet potatoes are high in beta carotene, which helps to build heart-healthy vitamin A within the body. Microwave or steam vegetables with as little water as possible to retain the maximum amount of nutrients.

Level 2: Whole Grains, 6 servings a day

• Teff
• Amaranth
• Millet

Whole grains are the next level up. Whole grains are high in fiber and necessary to colon health. Teff, amaranth and millet are whole grains popular in other parts of the world but now widely available in the US. These whole grains are high in protein. One key to longevity is getting more of your protein from plants instead of animal sources. They are also high in calcium, which helps to strengthen bones, and omega-3 fats which are critical to brain health. Millet is also a great source of B-complex vitamins.