British and American e-cigarettes are safer than ever, according to a new study.
It also found that the British and French models are less harmful than e-cigs imported from China.
The study was led by Dr. Anthony Fauci, professor of pediatrics at Yale University.
The research team surveyed more than 7,000 British and British-Irish adults.
It found that smokers who tried both British and English-language brands were slightly more likely to quit smoking than smokers who used American and French brands.
The researchers also found no differences in rates of cancer or cardiovascular disease among the groups.
Fauci says the new study, which is published in the American Journal of Preventive Medicine, shows that the e-cigarette industry is moving away from the toxic and addictive properties of tobacco cigarettes and toward safer and more effective ways to deliver nicotine to the body.
Fausci said the findings suggest that e-cig products are much safer than what people inhale from conventional cigarettes.
He says this new research helps doctors to better understand the risks of e-liquids.
The British and European Union are also looking at new regulations that could force the industry to adhere to more strict rules.
British officials are also considering banning the sale of e and vapes, the use of disposable e-pipes and vaporizers and the production of nicotine-laced e-juice.
The U.S. and Canada have also been cracking down on e-liquid manufacturers.