Diet soda or the regular soda, both these beverages are junk and therefore, you must never drink it. One glass of Coke is 170 calories with 47 grams of carbohydrates. Do you want to know the sugar content? You would palpitate if you knew how much sugar you’re taking in because of Coke. Read here why Coke is bad for you. Switch to unsweetened tea or infused water. It’s better.