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Zero calories should mean zero weight gain -- but in nutrition, like life, things are seldom black and white.

Over the past few years, some studies have speculated that artificial sweeteners might actually stimulate hunger. Conversely, other studies suggested that sucrose -- a.k.a. table sugar -- might promote weight loss.

So what does a dieter drink?
In a study done by Danish researchers, 41 overweight people supplemented their diets with either sucrose or artificially sweetened drinks. Ten weeks later, the sucrose set gained an average of three pounds, while the fake-sweetener group lost nearly two pounds.

Why?
The sugar-drinkers added more than 400 calories each day to their normal intake - all of that went past their appetite sensors and on to their waistlines. Calories you drink do not help satisfy your appetite. Because you never compensate for the extra calories by eating less, you end up gaining weight.

You can save between 140 and 150 calories for every 12-ounce can of regular soda you replace with a diet soda.

Just do not go overboard: Stick to only three or four 12-ounce cans a day to avoid the risk of exceeding maximum intake levels of artificial sweeteners.

See also:
Carbonation -- Carbonation is beneficial as it keeps soft drinks safe from bacteria and microbes.
Soft Drink Facts
Diet Coke Can Help Weightloss