Matcha's caffeine content can vary depending on how it is grown, brewed, and its quality. Find out how much caffeine is in a cup of matcha.

They're everywhere: beverages that promise to keep you energized, revved, and alert. But labels don't have to reveal how much caffeine the products pack. We will. We measured the amount in 27 top ...

Many people depend on Starbucks for their daily dose of caffeine. However, it's not completely realistic to spend the money ...