John Higgins, McGovern Medical School at UT Health in Houston. But, Katz said, "this is a small study looking only at acute effects and can not be considered proof that energy drinks injure the cardiovascular system over time".
The participants were all in their 20s, non-smoking and classified as "healthy".
Some experts believe the cardiovascular side effects could be related to their impact on blood vessel - or endothelial - function.
According to Cedars-Sinai Medical Center in Los Angeles, endothelial dysfunction has been shown to be an indicator of heart attacks because the arteries are unable to dilate fully.
The researchers measured the "artery flow-mediated dilation" of 44 students after drinking a large can of energy drink, using ultrasound. After 90 minutes, the internal diameter of blood vessels tested was dramatically smaller, on average, than before, the investigators found. That being said, the combination of sugar and stimulants in these drinks has no proven benefit, Katz added."There are far better ways to boost energy, such as standing up and getting a bit of exercise", he suggested.
It also releases extra stress hormones - such as adrenaline - which can temporarily increase blood pressure.
These boosters are the most popular dietary supplement used by teens and young adults in the United States, according to data from the National Center for Complementary and Integrative Health (NCCIH).
A new study, led by Dr John Higgins, a professor of medicine at McGovern Medical School at the University of Texas Health Science Center, has found that intake of energy drinks could make the blood vessels less efficient. "This could explain why there have been cases where kids have had a cardiac arrest after an energy drink", he said.
Energy drinks like Red Bull and Monster have been linked to stomach, nerve and heart problems in the past, but this study by the University of Texas is one of the first to shed light on the potential increased risk of heart attack and stroke.
An April 2017 study from the David Grant USAF Medical Center in California found that one 32-ounce energy drink can cause risky arrhythmia, a condition in which the heart beats with an irregular or abnormal rhythm.