Most energy drinks contain large amounts of caffeine, which can provide a temporary energy boost. Some energy drinks contain sugar and other substances. The boost is short-lived, however, and may be accompanied by other problems.
How much caffeine does energy have?
Energy drink Caffeine (mg/litre) Caffeine per serving (quantity)
----------------- ------------------- --------------------------------
Beaver Buzz 449 110 mg (8.3 fl oz or 245 ml)
Blue Charge 300 300 mg (35.195 fl oz or 1000 mL)
Bomb Energy Drink 320 80 mg (8.45 fl oz r 250 ml)
Breinfuel 1014 360 mg (12 fl oz or 354 mL)