Regardless of its higher caffeine content or caffeine's effect on its taste, Diet Coke's popularity doesn't seem to be slowing. It remains one of the highest-selling sodas in the nation ...

but it is also packed with refined salts and caffeine." Coca-Cola has acknowledged the high sugar content in its beverage, stating that it contains sugar and caffeine and is "fine in moderation ...

Diet Coke doesn't actually contain all that much caffeine. For example, the popular diet soda's caffeine content still pales ...