I am repeating Health Canada's recommendation. The Canada Food Guide recommends that we opt for other drinks as our beverages of choice. That being said, those who choose to consume carbonated drinks containing caffeine should monitor their daily caffeine dietary intake.
The idea here is that a healthy adult should not exceed 400 mg of caffeine a day. For a pregnant woman or a woman of childbearing age, the limit drops to 300 mg. Children's intake should be monitored even more carefully, as they are more sensitive to caffeine. As we said earlier, the maximum recommended intake for children can be as low as 40 mg or 45 mg.