From chocolate to chewing gum, uncover how these sneaky sources may be affecting your sleep and energy levels. Reviewed by ...

The European Food Safety Authority (EFSA) sets a recommended daily limit of 400 milligrams of caffeine for healthy adults. This limit takes into account not only coffee, but also other sources of ...

Why the secrecy? Their blends may be proprietary. (Common blends include amino acids, carbohydrates, or guarana, a botanical caffeine source.) A representative of the Monster Beverage Corporation ...