The study found that blood vessels, when exposed to vape fluid, started to exhibit "significantly increased levels" of cell death and DNA damage.
In the new study, which included six e-liquids with varying nicotine concentrations, Wu's team found evidence of toxic effects - including poorer cell survival and signs of increased inflammation - on a type of cardiovascular cell.
VAPING: E-cigarette liquids may increase the risk of heart disease (Pic: GETTY) "The public has this notion that e-cigarettes are safe".
All flavors caused significant damage to the endothelial cells, but the cinnamon and menthol flavored e-liquids were especially harmful. They also tested e-liquids with varied nicotine content. In addition to those issues, our data suggests that e-cigarette users do not want to use these devices forever. Although people, particularly teens and young adults, may feel that e-cigarettes are a safer alternative to traditional cigarettes, a host of research suggests that is not the case - particularly because it's frighteningly easy to inhale large quantities of nicotine with the battery powered devices. A study a year ago showed that daily e-cigarette users had an increased risk of having a heart attack, though not as high as daily smokers. "It doesn't have the carcinogens associated with smoking, but don't use e-cigarettes with the assumption that if I switch to e-cigarettes it will be good for my cardiovascular health". The response of these cells after coming in contact with e-liquids was also closely observed by the researchers.More news: "Marvel's Avengers" Video Game Will Be Revealed At E3
Cells, known as endothelial cells, line the surface of the blood vessels and help keep your heart healthy. Blood serum from e-cigarette users showed harmful effects, similar to those of tobacco cigarettes on blood vessels.
"There's so many kids who are smoking e-cigarettes". The worst effects were seen for the cinnamon and menthol flavors, even when they did not contain nicotine.
One in five high school students have tried e-cigarettes.
The findings, published online by the Journal of the American College of Cardiology, showed that exposure to the e-liquids also increased the relative levels of reactive oxygen species - molecules that can cause DNA damage - and the levels of molecules associated with cell death.More news: New Gods: Ava DuVernay and Batman Comics Writer to Pen Screenplay Together
Dr Wu said: 'When you're smoking a traditional cigarette, you have a sense of how many cigarettes you're smoking.
They also tracked what happened when those cells were bathed in blood taken from people right after they had an e-cigarette, the way chemicals from vaping would make their way to the cardiovascular system.
"And now we know that e-cigarettes are likely to have other significantly toxic effects on vascular function as well".
He added: "It's important for e-cigarette users to realise that these chemicals are circulating within their bodies and affecting their vascular health."The Mirror".More news: Death Stranding out November 8, here’s the trailer
Other Stanford co-authors are research assistant Yang Zhou; postdoctoral scholars Lei Tian, PhD, and Hongchao Guo, PhD; graduate student Hye Ryeong Bae; undergraduate student Natalie Baker; and professor of pediatrics Kari Nadeau, MD, PhD.