Most energy drinks are carbonated drinks that contain large amounts of caffeine and sugar and other legal stimulants like ephedrine, guarana, and ginseng. Energy drinks may contain as much as 80 mg of caffeine, the equivalent of a cup of coffee.

 Energy Drinks Overview & Side Effects?

Energy drinks side effects really vary depending on the brand and the exact combination of ingredients. Many energy drinks have a very high percentage of carbohydrates that can make it more difficult for food and nutrients to be absorbed into the bloodstream from the intestines. In some cases, gastrointestinal problems and distress are a possibility. This side effect is one reason why these energy drinks are not as good for athletes as they are purported to be. Slowing the rate of fluid absorption can make it more difficult to re-hydrate oneself during exercise, which can be dangerous to one’s health.

Fructose and sugar content can also have certain side effects. When an energy drink has a high sugar content, it can have a laxative effect, as well as causing a sudden "crash" when the sugar leaves the bloodstream and the energy high disappears. Clearly, the energy-producing ingredients in the energy drinks result in a desired effect: a stimulation of the nervous system that can also cause changes in neurotransmitters, making people feel more energized. However, if caffeine is the ingredient primarily responsible for creating this energy high drinkers should be aware that high levels of caffeine can have both laxative and diuretic effects.

Other ingredients can produce additional side effects. Echinacea is said to bolster the immune system, while Ginkgo biloba and ginseng are claimed to improve memory. Ephedra, Ciwujia, and hydroxycitrate all promote fat-burning, and kava-kava can produce a calming effect. When choosing whether or not to consume energy drinks or which one is best for you, it is important to consider possible side effects to prevent potentially dangerous health problems.