But labels don't have to reveal how much caffeine the products ... and watch the video about how well 5-Hour Energy really works. Safe limits of caffeine consumption are still being studied ...

And we might resort to energy drinks because they have much more caffeine than coffee: An average 8-ounce coffee has just under 100 milligrams of caffeine and a 1.93-ounce bottle of 5-hour ENERGY ...

5-hour Energy shots may have 200-300 milligrams of caffeine in varying sizes from ... an energy boost and improved concentration, but too much can lead to side effects, detrimental side effects ...

Using the calculated area and a calibration curve, students will be able to determine the mg/mL of caffeine in the beverage. Caffeine has been used for centuries to help mankind stay awake and gain ...

Horror stories frequently pop up in the media about the amount of caffeine ... 5 minutes) 53.8 (200) 26.9 Relentless 162.6 (500) 32.5 No Fear 203.3 (473) 43.0 Red Bull 75.0 (250) 30.0 5 hour ...