What foods contain the highest amounts of caffeine?

Energy drinks usually have the highest caffeine content, with some containing 300 milligrams of caffeine or more per 8-ounce serving. Coffee is next, with 80 to 150 milligrams per 6-ounce serving, followed by teas and cola soft drinks. Dark chocolate and coffee-flavored foods are also significant caffeine sources.

Caffeine is a common ingredient in gums, candies and snacks marketed as energy boosters. It is also present in some over-the-counter diet and pain medications. While most people can safely consume up to 400 milligrams of caffeine daily, doses exceeding 1 gram can cause caffeine intoxication, while as little as 5 grams can be fatal.