This amounts to one serving of a caffeinated beverage for every person every day.

This was based on a new study of caffeinated beverages (not just coffee) carried out on a relatively small number of participants.

Coffee, tea and other naturally caffeinated beverages are usually not considered energy drinks.

First decrease the amount of liquid that you are ingesting, and avoid drinking caffeinated beverages because they irritate the bladder.

The most common naturally caffeinated beverages are coffee and tea, which in one form or another (usually served hot, but sometimes iced) feature in most world cultures.