Not only does watching television take away physical activity time from children, it also promotes poor diet. According to WebMd, "the average teenager in the United States sees about 15 food advertisements per day, which may unknowingly affect the way they eat." Unfortunately, almost all food advertisements seen by children are for products high in fat, sugar or sodium, and often low in fiber. A study by researchers at Yale University found that "children who ate a snack while watching TV ate 45% more during and after eating.