While energy drinks can provide a quick boost of energy for people who have been working too hard or are fatigued, they have some negative effects on the body that should not be ignored. Cardiovascular problems and potential weight gain are among the disadvantages to energy drinks, according to HealthResearchFunding.org.
On the positive side, energy drinks boost one's energy and sharpen mental focus. Athletes often drink them to help extend their workouts, thanks to the extra energy provided by the drink. They are also quick and convenient, since they don't require the amount of time needed for an adequate nap or even for brewing a cup of coffee.
The negatives of energy drinks show up in the body's physical reactions to them. Energy drinks typically contain a lot of sugar, which can lead to unhealthy weight gain. Those who overindulge in energy drinks run the risk of cardiovascular damage, including increased blood pressure and irregular heartbeats. Energy drinks also often create anxiety and irritability, decreasing the drinker's ability to function well mentally. These physical reactions are mainly due to the extremely high levels of caffeine in energy drinks; the levels are higher than those in soft drinks and are not regulated in any way. Side effects from drinking energy drinks can include headaches, insomnia, jitters, type 2 diabetes and vomiting.