Soda is a poor choice for a fluid. In your weight loss journey, calories do count and a 12 oz cola has approximately 136 empty calories. Most of these calories are from carbohydrates (approx 34 grams). This fluid will raise your blood sugar, give you with little nutrition, and cause your weight loss journey to fail. Switch to water and save those calories If you need more flavor there are many low calorie powders that you can add for a variety of delicious flavors.