"We have made real progress, but there is still more work to do".
The study was published in the Proceedings of the National Academy of Sciences in the United States, just as MPs in the United Kingdom are holding an inquiry into the health effects of e-cigarettes to address gaps in research.
According to scientists at the University of CT, a brand new test that examines DNA has concluded that the nicotine liquid-filled devices can cause as much damage to humans as standard tobacco products. Participants tended to go longer in the morning before having a vape, they reduced to e-liquids with less nicotine over time and some vaped only zero nicotine e-liquids.
The researchers wrote: "We propose e-cigarette smoke is carcinogenic and that e-cig smokers have a higher risk than non-smokers to develop lung and bladder cancer and heart diseases".
Typically, an e-cigarette is filled with chemicals like propylene glycol, glycerine, nicotine, and flavorings such as menthol or mint.
Vaping causes DNA mutations which lead to cancer, a new study warns. By 2015, 16 per cent of American high school students said they used e-cigarettes, making it the most popular nicotine product among kids.
E-cigarette smoke (ECS) delivers nicotine through aerosols without burning tobacco. NRT has always been known as a much safer alternative to smoking'.
To begin the study, the researchers tested how known cancer-causing chemicals found in regular cigarettes damaged a DNA sample. Their organs were likewise less able to fix DNA.
A series of studies have hinted however that e-cigarettes may not be harmless.
That is similar to the level in those on nicotine-replacement therapy. The report found vaping was likely to be less harmful than conventional cigarettes.
Last week a major U.S. report into the health effects of e-cigarettes found that vaping might be useful to help people quit smoking. Instead they contain nicotine, which is what keeps people addicted, but is not responsible for the major health harms from smoking.
In 2016, the FDA finalized a rule extending its regulatory authority to all tobacco products, including e-cigarettes, cigars, as well as hookah and pipe tobacco, as part of its goal to improve public health.
While tobacco smoke contains a host of potentially unsafe chemicals, e-cigarette vapour consists only of nicotine and some relatively harmless organic solvents.