From Food Insight TV, this video reviews the basics of caffeine: Natural sources; Caffeine consumption breakdown (how much of the US population consumes caffeine, and from what sources); Why moderation is so important; and the maximum dosage recognized as safe for adults.

Additional Resources:

• Caffeine: Facts, Usage, and Side Effects

Caffeine Informer reviews the sources and chemical structure of caffeine, in addition to a review of caffeine's positive and negative effects

• Caffeine Consumption in the USA

How many Americans consume caffeine on a daily basis, and where do they get this caffeine from? This study involving over 40,000 people breaks down consumption patterns by source and age.

• Open Letter to Time Regarding Energy Drink Article in the "Answer Issue"

The Time "Answer Issue" article on energy drinks is missing three crucial statistics. Green-Eyed Guide discusses these missing statistics in a plea to Time magazine to reconsider the perspective.

• Are You a Monster or a Rock Star: A Guide to Energy Drinks -- How They Work, Why They Work, How to Use Them Safely

Discover the key factors that make energy drinks safe or unsafe. Meet the 20 most common ingredients found in energy drinks and learn the basic science to how they work. With this guide and the "Levels of Fatigue" outlined within, anyone can learn the tools for determining which energy drink (IF ANY!) are right for his or her lifestyle and diet goals.