Fruit concentrate is "fruit with the water removed," says Caroline West Passerrello, a registered dietitian nutritionist and a spokesperson for the Academy of Nutrition and Dietetics. "It retains the sugar and calories, but it loses the volume, fiber and vitamin C." Concentrates made from 100% fruit are the healthiest option, as they pack the most nutrients and are only sweetened with natural fruit sugars — not added sugar. However, they may still harbor additives.