It's not just fast food, its eating fast that may underlie the obesity epidemic. New research from Greece and Great Britain suggests that speed eating doesn't give your body's appetite control process time to send signals that you've had enough to eat. The investigators recruited 17 healthy men and served them ice cream. They first told the men to eat the two big servings in five minutes. Later, they gave them men the same amount of ice cream in smaller servings and told them to take their time and finish eating within 30 minutes. The researchers found that when the men ate more slowly, levels of two hormones released by the digestive tract to signal "fullness" rose appropriately and stayed at effective appetite-curbing levels for about three hours. The rushed snack did not elicit a similar increase in these hormones. The investigators noted that earlier studies reported that taking time to chew food thoroughly and enjoy a meal results in eating fewer calories than when the same size meal is eaten in haste. The new study is published in the January 2010 issue of the Journal of Clinical Endocrinology & Metabolism.