The rise in beverage consumption has mirrored the country's tramp toward rounder figures. “Satiety is less when you drink calories versus eating the same calories in foods because drinks empty from the stomach quicker,” says Phillips. “The extra calories from liquids can easily exceed what the body can use.” The worst offenders are “liquid candy” like soda and energy, sport, and sweetened fruit drinks. In a study published in the American Journal of Clinical Nutrition, Harvard researchers confirmed that a greater intake of these beverages leads to weight gain in adults and children. “Plus, most sweetened drinks don't have much nutritional value,” says Ayoob. Though they contain important vitamins, fruit juices such as orange, cranberry, and apple still pack a lot of concentrated sugar.