While experts believe it’s safe for most healthy adults to consume up to 400 milligrams of caffeine a day – about the equivalent of four 8-ounce cups of coffee or 10 cans of cola – downing multiple energy drinks daily could quickly put someone over that limit, increasing their risk for headaches, as well as boosting …

Safety

• Large amounts of caffeine may cause serious heart and blood vessel problems such as heart rhythm disturbances and increases in heart rate and blood pressure.
• Caffeine use may also be associated with anxiety, sleep problems, digestive problems, and dehydration.

Most energy drinks contain extremely high levels of sugar, or more commonly, high fructose corn syrup: a less expensive (and less healthy) alternative to real sugar. Too much sugar can lead to obesity and can negatively affect blood sugar levels, which acts as a gateway to other serious health issues.

Scientists found that drinking Red Bull and Monster could cause your blood vessels to narrow, which increases the risk of blockages that cause heart attacks and strokes.

That’s because while Red Bull contains about as much caffeine as a cup of coffee, it also contains an insane 37 grams of sugar in a 12-ounce can. This combination stimulates the brain and nervous system, shocking the body into alertness.

Simply consuming an energy drink won’t cause brain damage. There are a number of other factors that come into play. However, the high levels of caffeine in these drinks can alter a person’s behavior, which is why many teens have sustained injuries.

Red Bull, 5-Hour Energy, Monster, AMP, Rockstar, NOS and Full Throttle are examples of popular energy drink products. Nearly all energy drinks contain the ingredient caffeine to stimulate brain function and increase alertness and concentration.

Energy drinks are not particularly good for you although it is not true that the directly cause problems with your brain. However, they do contain very large amounts of caffeine. Drinking caffeine in excess can lead to jitteriness,mood problems, and trouble with sleep (all of which are, in a way, brain problems).

The study’s author, Kathleen Miller, an addiction researcher at the University of Buffalo, says it suggests that high consumption of energy drinks is associated with “toxic jock” behavior, a constellation of risky and aggressive behaviors including unprotected sex, substance abuse and violence.