Evidence increasingly suggests that a varied diet, not individual food chemicals, is essential for basic health and a longer life. Such diets are rich in fresh fruits and vegetables and whole grains, and low in saturated fats.
Some Examples of Healthy Foods
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Foods
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Phytochemicals and Carotenoids
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Vitamins and other valuable food components
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Claimed Benefits
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Apples
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Flavonoids
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Claimed to have activity against certain cancers (lung), but poorly proven. Also may help maintain healthy cholesterol levels. May protect against asthma.
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Beans
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Flavonoids
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Folate, iron, potassium, and zinc
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Some experts believe beans are the perfect food.
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Berries, all kinds of dark colored
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Ellagic Acid
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Vitamin C, minerals
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The anthocyanins in berries such as blueberries, cranberries, and elderberries have numerous healthful properties, including antioxidant effects. Blueberries may help protect the aging brain.
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Broccoli (also kale, Brussels sprouts, and cauliflower)
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Flavonoids, isothiocyanates, lutein, beta- and alpha-carotene. Note: Young sprouts of broccoli and cauliflower contain much higher levels of isothiocyanates than their mature forms.
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Vitamin C, folate, fiber, and selenium
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Anticancer properties, but poorly proven. Protective against heart disease and stroke.
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Carrots and other bright yellow vegetables
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Lutein, beta-carotene and other provitamin A carotenoids
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Vitamin A (converted from carotenoids), vitamin C
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Protects eyes, lungs. (Cooking carrots may increase the potency of food nutrients.)
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Chocolate, dark. Note: Milk chocolate does not have benefits.
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Flavonoids
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Heart protective (may help prevent blood clotting). Claimed to have protective properties against lung cancer (not other cancers), but poorly proven.
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Eggs
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Lutein
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Many B vitamins, vitamin A, vitamin D
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Although egg yolks are high in cholesterol, that cholesterol has little negative effect on people with normal cholesterol levels. (People with diabetes or those with high cholesterol should restrict eggs, however.)
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Fish, oily (mackerel, salmon, sardines)
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Vitamins B3, B12. Essential fatty acids, selenium
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Heart and brain protective.
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Garlic
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Allium (organosulfurs)
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Claimed to be protective against certain cancers, heart disease, and infection. Heating garlic can reduce its benefits. Allowing crushed fresh garlic to stand 10 minutes before heating, however, may preserve beneficial chemicals while cooking.
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Ginger
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Zingiberaceae
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Cancer fighting properties.
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Grains (whole)
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Lignans (phytoestrogens)
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Vitamin B, Selenium (important antioxidant mineral), fiber, folate
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Claimed to help reduce the ability of cancer cells to invade healthy tissue, but this is poorly proven.
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Grapes, including purple grape juice, and red wine
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Flavonoids, (resveratrol, quercetin and catechin)
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Fight heart disease and cancer. May help lower the risk for asthma.
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Nuts
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Vitamin E, vitamin B1, essential fatty acids, folate
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Protect the heart and may help prevent stroke.
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Onions
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Flavonoids, allium (organosulfurs)
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Claimed to have activity against certain cancers (lung).
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Oranges
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Monoterpenes
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Vitamin C, folate, potassium.
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Many health benefits. Increases "good" HDL cholesterol levels.
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Potatoes (sweet)
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Vitamin C, vitamin E, vitamin A
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Many health benefits.
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Soy. The best products are tofu, soy milk, or whole soy protein.
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Isoflavones (phytoestrogens), flavonoids, phytosterol, phytate, saponins.
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May have some effects similar to estrogen, including maintaining bone calcium. May also help protect against prostate cancer and possibly other cancers, but this is poorly proven. More studies are needed. Effects on breast cancer are uncertain. (Note: Soy may have different effects in men than in women.)
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Spinach and other dark green leafy vegetables
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Zeaxanthin, Beta-carotene
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Vitamin C, folate, vitamin A (converted from carotenoids)
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May protect lungs and brain.
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Tea (Both black and green tea are beneficial. Best results associated with green tea.)
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Flavonoids (primarily catechins)
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Cancer fighting properties, particularly in green tea, which may be especially beneficial for smokers.
Both black and green tea may protect against heart disease and stroke, although studies are mixed.
Tea drinking also may help with weight control and help prevent osteoporosis.
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Tomatoes
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Lycopene, Flavonoids
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Vitamin C, biotin, minerals
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Studies link tomatoes to reductions in prostate and other cancers. Infection fighters.
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Note on Organic versus Inorganic Products. There is some evidence that organic produce has higher levels of antioxidants and that some agricultural chemicals may destroy flavonoids. Nevertheless, organic produce is expensive, and fruits and vegetables, no matter how they are grown, are still filled with healthful nutrients.
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