What are some top-rated energy drinks?

Some top-rated energy drinks are Red Bull, Monster and 5-Hour Energy. In the United States the energy drink industry has grown by 56 percent between 2009 and 2014 and is projected to reach $10.6 billion in profits by 2019.

Red Bull is the most popular energy drink in the world, with 43 percent of the market share in 2014. One 3.4-ounce can contains 80 milligrams of caffeine, and its active ingredient is taurine.

Monster is another top-rated energy drink that made up 29 percent of the market in 2014. A 16-ounce can of the original Monster contains 160 milligrams of caffeine. There are many variation of this energy drink available in stores.

5-Hour Energy is the most popular energy drink that comes in shot form. A 2-ounce bottle contains 138 milligrams of caffeine, and other active ingredients include taurine, vitamin B-12, vitamin B-6 and glucuronolactone