Eating whole grains instead of refined grains may have benefits for your waistline, a new study suggests. Adults who ate three or more servings of whole grains per day, and limited their refined grains to less than one serving per day, had 10 percent less belly fat than those who did not follow this diet, study researcher Nicola McKeown, a scientist with the USDA Human Nutrition Researcher Center on Aging at Tufts University, said in a statement. For comparison, a slice of 100 percent whole wheat bread or a half-cup of oatmeal constitutes one serving of whole grains, and a...