From Abbie, Age 15 - 01/23/12 - IP#: 68.13.18.xxx  Click here to reply  
Ht. 5'5", Start: 147 lb, Today: 145 lb (BMI %tile: 84), Goal: 125 lb - I swear I've told you this before, or maybe someone else but I know I've heard this question.
All soda is bad for you it doesn't matter if it has 10 calories or 100 calories most people that are on a diet have 2000 calories per day. Even diet soda is bad for you just think about it. I did a little research and found this
Carbonated water (plain water infused with carbon dioxide
Caramel color (natural additive to create color)
Natural flavors (often citrus flavors for added taste)
Caffeine (diuretic and stimulate that can be addictive)
Phosphoric acid (chemical that adds tangy or sour flavor by breaking down starch to sugar)
High-fructose corn syrup (no nutrition, lots of calories)
No matter if you drink a regular or a diet soda, you'll find that drinking one or more a day will cause a 30% increased chance of gaining weight around the midsection than if you opted for water or another beverage.
Aspartame (nutrasweet) is a chemical that stimulates the brain to think the drink is sweet, which actually causes more food cravings, which can lead to loading up on carbs. Aspartame breaks down into aspartic acid, phenylalanine, and methanol when it's at 86F, and it's even been linked to obesity.