Scientists may disagree on what's so good about plants- the antioxidants? the fiber? the omega-3 fatty acids?- but they do agree that they're probably really good for you and certainly can't hurt. There are scores of studies demonstrating that a diet rich in vegetables and fruits reduces the risk of dying from all the Western diseases; in countries where people eat a pound or more of vegetables and fruits a day, the rate of cancer is half what it is in the United States. Also, by eating a diet that is primarily plant based, you'll be consuming far fewer calories, since plant foods-with the exception of seeds, including grains and nuts-are typically less "energy dense" than other things you eat. (And consuming fewer calories protects against many chronic diseases.) Vegetarians are notably healthier than carnivores, and they live longer. -Michael Pollan, Food Rules
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