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Start edging up the amount of produce in your daily diet and chances are good that you’ll eat fewer calories without even noticing. A recent look at the massive Continuing Survey of Food Intakes by Individuals (CSFII)—the government’s chief survey of American eating habits—found that men and women with the highest average vegetable and fruit intakes (more than 4 1/2 cups daily) tended to have the lowest rates of obesity. And, even though they ate a greater amount of food, their actual calorie intake was lower, since their produce-rich diets were in effect “watered down” with low-calorie fruits and vegetables.