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iVillage: Natural Remedies Doctors Use to Stay in Tiptop Shape

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Strengthen Immunity with Veggies

”I’m often in contact with sick people, so I eat lots of colorful veggies to prevent illness,” says Dr. Kulze. “Carrots, peppers, sweet potatoes, kale...colorful vegetables are the true superstars for boosting immunity.” The more colorful the better -- because it’s what’s in the plant’s pigment that keep the lining of your respiratory tract healthy so viruses can't get a toehold and increase your production of disease-fighting immune cells. Eating two cups daily will cut your risk of illness in half, say UCLA researchers.

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