Drinking only one energy drink may in some cases increase the risk of a heart attack within 90 minutes, according to a study at the University of Texas in Houston.
Researchers found that energy drinks constricted blood vessels, hindering blood flow and limiting blood flow to important organs, including the heart, reports Medical News Today.
It is well known that energy drinks have a bad effect on the stomach, nervous system and can cause heart problems if consumed in large quantities, but now the list of adverse effects is added to the increased risk of metabolic syndrome.
During the study, scientists observed 44 healthy medical students aged 20 who are non-smokers.
The aim of the study was to check the function of the endothelium, the tissue layer inside the blood vessels, because previous studies from the Sidars-Sainay Scientific Center at the homonymous Los Angeles hospital say that endothelial dysfunction has proven to be an important indicator of the increased risk of heart attack, because in these cases the arteries can not fully spread.
Houston experts checked the endothelial function of each respondent before drinking energy drinks and 90 minutes later. It turns out that after an hour and a half of drinking these drinks the diameter of the blood vessels is half as much.
Researchers linked this harmful effect to energy drink ingredients, mainly caffeine, taurine and sugar.
An energy drink can on average contain 37 grams of sugar (9 tablespoons), as well as 80 mg of caffeine, which can cause increased secretion of adrenaline, which causes a leak of blood pressure.
According to statistics in America, one-third of young people under the age of 17 regularly drinks energy drinks, and a survey in 2017 showed that three cans (960 milliliters) can cause dizziness and arrhythmia in as many as 50 percent of young teenagers.