CONSUMING only one energy drink can increase the risk of heart attack and stroke in 90 minutes, a study found.

Scientists at the University of Texas in Houston say that energy drinks narrow down the blood vessels, which limits the blood flow to vital organs.

Early studies have shown that energy drinks have a terrible effect on the stomach, nervous system and cause heart problems. However, now it is first revealed that their consumption increases the risk of metabolic syndrome.

The researchers looked at 44 students in their twenties, the non-smokers rated healthy.

The study aimed to check the function of the endothelium, a thin layer of cells located on the inner surface of the blood vessels. According to the Cedars-Sinai Center in Los Angeles, endothelial dysfunction has been shown to be an indicator of a heart attack because the arteries cannot fully stretch.

The examining team checked the function of the endothelium of each student before drinking energy drinks and 90 minutes later.

Only 90 minutes after the inner diameter of the blood vessels was half the size. Scientists associate this negative effect with energy drink ingredients like caffeine, taurine and sugar.

Most energy drinks contain plenty of sugar. In a tin of 355 milliliters, there are 37 grams of sugar, or nine teaspoons.

Such drinks contain 80 milligrams of caffeine to 250 milliliters, roughly two and a half cups of Coca-Cola. Caffeine can cause the release of adrenaline, a hormone that increases blood pressure.

According to information available to the National Center for Complementary and Integrative Health, up to one third of Americans between the ages of 12 and 17 regularly consume energy drinks.

“Energy drinks are becoming more and more popular, so it’s important to check what effect their regular consumption is, or whether there is a quantity that is safe for consumption,” says professor dr. John Higgins.

A study in 2017 revealed that 960 milliliters of energy drinks can cause arrhythmia, and in 2018, half of the subjects in the teens reported problems with heart, dizziness and seizures.