Energy drinks are beverages that contain ingredients marketed to increase energy and mental performance.

Red Bull, 5-Hour Energy, Monster, AMP, Rockstar, NOS and Full Throttle are examples of popular energy drink products.

Nearly all energy drinks contain the ingredient caffeine to stimulate brain function and increase alertness and concentration.

However, the amount of caffeine differs from product to product. This table shows the caffeine content of some popular energy drinks: