Since one can of soda per day will add up to more than 5 pounds per year, it stands to reason that eliminating those extraneous calories will equal some form of weight loss. Yes, it will. And, by switching to the diet, calorie free version of Diet Coke, you get your soda without the weight gain. Recently though, Diet Coke has been speculated to be as harmful to your body as the calorie packed version; because of artificial sweeteners, and the carbonation of the water contributing to disruption in the body.