WaterLeaks

A 5-Hour Energy shot has about 200 mg of caffeine plus B vitamins at many times the daily value. Occasional use is unlikely to harm a healthy adult, but jitters, lost sleep, and the niacin flush are real, and energy shots are not for kids.

An 8.4 oz Red Bull has 80 mg of caffeine, less than a typical cup of coffee, and 27 g of sugar in the regular version. An occasional can is fine for most healthy adults. The real issues are daily sugar, stacking cans, mixing with alcohol, and kids drinking it.

An occasional Monster is not dangerous for most healthy adults. The real concerns are the 54 grams of sugar in a regular can, daily caffeine habits, teens, mixing with alcohol, and people with heart conditions.