The idea that there are negative-calorie foods is one of the biggest scams around. Even when munching on 10 stalks of celery, which has the maximum chew per calorie, we burn a measly 0.115 calories of the 60 calories. While negative-calorie foods are a myth, invisible calories are real. Clear liquids, such as alcohol and soft drinks, sneak by the appetite-control guards in your brain, adding silent calories on top of your normal fare. In one study, when people drank lemonade before or during lunch, they did not cut back on calories, consequently the 166 calories in the lemonade was added to the total calories for the day. It doesn’t matter if you drink a sugar-laden beverage with or before a meal, the calories are added to, they don’t displace, the calories from food.