Just one can of the popular stimulant energy drink Red Bull can increase the risk of heart attack or stroke, even in young people, Australian medical researchers said on Friday. Red Bull is banned in Norway, Uruguay and Denmark because of health risks listed on its cans, but the company last year sold 3.5 billion cans in 143 countries, including Saudi Arabia where the drink is hugely popular among youth. The researchers found in their tests on 30 young adults one hour before and one hour after consuming one 250ml can of sugar-free Red Bull that the caffeine-loaded beverage caused the blood to become sticky, a pre-cursor to cardiovascular problems such as stroke. “One hour after they drank Red Bull, (their blood systems) were no longer normal. They were abnormal like we would expect in a patient with cardiovascular disease,” Scott Willoughby, lead researcher from the Cardiovascular Research Centerat the Royal Adelaide Hospital, told The Australian newspaper. The results showed “normal people develop symptoms normally associated with cardiovascular disease” after consuming the drink, created in the 1980s by Austrian entrepreneur Dietrich Mateschitz based on a similar Thai energy drink. Red Bull Australia spokeswoman Linda Rychter said the report would be assessed by the company's head office in Austria. “The study does not show effects which would go beyond that of drinking a cup of coffee. Therefore, the reported results were to be expected and lie within the normal physiological range,” Rychter told Reuters. One can contains 80 mg of caffeine, around the same as a normal cup of brewed coffee. The Austria-based company, whose marketing says “Red Bull gives you wings”, sponsors Formula 1 race cars and extreme sport events around the world, but warns consumers not to drink more than two cans a day. Rychter said Red Bull could only have such global sales because health authorities across the world had concluded the drink was safe to consume. But Willoughby said Red Bull could be deadly when combined with stress or high blood pressure, impairing proper blood vessel function and possibly lifting the risk of blood clotting. “If you have any predisposition to cardiovascular disease, I'd think twice about drinking it,” he said.
