Those people are much more likely to become obese or gain weight if they drink soda or sugar sweetened drinks.
Scientists increasingly believe sugared drinks can put on more weight than the same number of calories in other foods. Doctors say this is because such massive doses of sugar in liquid form may completely undermine the body's ability to regulate its weight, especially for those already susceptible to gaining weight.
The American Beverage Association responded in a written statement saying sugar sweetened beverages are not driving obesity. By every measure, sugar sweetened beverages play a small and declining role in the American diet.