About 25 percent of children and more than 41 percent of adults in the United States reported consuming foods and beverages containing low-calorie sweeteners (LCS) such as aspartame, sucralose, and saccharin in a recent nationwide nutritional survey, according to a study out today. Those numbers represent a 200 percent increase in LCS consumption for children and a 54 percent jump for adults from 1999 to 2012.