In the United States, you aren't allowed to know this information on the label of the drink you are buying. In Canada, soft drinks that contain caffeine are required to list the amount of caffeine on the container.
We can't guarantee that the Canadian versions are similar to those in the United States. They call high-fructose corn syrup "glucose-fructose" in Canada but the drinks should be the same.
In the past, Canada didn't allow soft drinks that weren't naturally full of caffeine to contain caffeine. So colas were the only soft drink to have caffeine. As you'll see, Mountain Dew in Canada now definitely has caffeine.
The soft drinks listed on the chart to the left were compiled from one grocery store visit based on what was on the store shelves. Those drinks without caffeine are obviously not listed.
These levels are in milligrams per 355 ml (12 oz.). See where your favorite soft drink placed.
- Mountain Dew is tops to no one's surprise. Mountain Dew has 50% more caffeine than Coca-Cola Zero.
- The biggest surprise is how high Diet Coke is in caffeine, 2nd on the chart at 45 mg, 11 mg more than its sister diet drink, Coca-Cola Zero.
- Pepsi and Diet Pepsi each has 1 more mg than its natural rivals, Coca-Cola and Coca-Cola Zero.
- The 2 Dr. Pepper brands have equal amounts of caffeine, unlike the other major soft drink players.
You are likely getting more caffeine from coffee than soft drinks, and you may not even care how much caffeine you are getting as long as the drink is keeping you awake.
It's intriguing that in this area of wanting food labels to contain more information that there isn't more of a cry to have caffeine levels on a label.
Consumers should know what they are getting in their food and drinks. Caffeine levels may not be as important, but that should be up for the consumer to decide.