I can attest that it works, and it's not due to caffeine
only. I generally drink 1-2 cups of coffee a day, and burn out after about 2 hrs tops. I usually get about 5-6 hrs out of 5 Hr., and the feeling is different than coffee. As mentioned, I don't get a niacin rush from it, but my wife does - she's more sensitive to it than I am; she takes 1/2 bottle at a time.
The regular 5 hr. contains 138 mg of caffeine, which is, as mentioned previously, about what is in a cup of coffee.
http://www.energyfiend.com/caffeine-.../5-hour-energy
Quote:
According to an article in the Journal of the American Dietetic Association, coffee has the following caffeine content, depending on how it is prepared:[123]
brewed: 1 cup (7 oz, 207 ml) = 80–135 mg.
drip: 1 cup (7 oz, 207 ml) = 115–175 mg.
espresso: 1 shot (1.5–2 oz, 45–60 ml) = 100 mg
http://en.wikipedia.org/wiki/Coffee#Caffeine_content
|
Here's a comparison of other energy drinks:
http://www.energyfiend.com/the-caffeine-database
NOTE: It's per ounce, so you have to multiply by # of oz in each drink.
Doc