But labels don't have to reveal how much caffeine the products pack. We will. We measured the amount in 27 top-selling energy drinks and ... (Common blends include amino acids, carbohydrates ...

And, thanks to its moderate caffeine content and the calming amino acid L-theanine, it can give you a boost of energy without the jitters that often come with that. Therefore, you can drink green ...

A sip of Dunkin' Energy is enough to have anyone bouncing off the ceiling. But have you ever wondered why? The secret is this ...