A new study shows that replacing one sugary drink a day with water can help a person lose weight and improve their health. Kiyah J. Duffey helped to write a report on the study. She says no matter how many sugar-sweetened beverages someone drinks, “replacing even just one serving can be of benefit.” Duffy is a specialist on human nutrition, foods and exercise. She teaches at the College of Agriculture and Life Sciences at Virginia Tech University in Blacksburg. Medical experts believe sugary drinks are partly to blame for the obesity epidemic in some areas. The drinks have also been linked to Type 2 diabetes and heart disease. The U.S. government's 2015 Dietary Guidelines for Americans says no more than 10 percent of a person’s daily calories should come from sugary drinks.