"If you want to quit cigarettes and go into e-cigarettes, your chances of having increased cardiovascular events does not increase," said Dr. Lin.
BOWLING GREEN, Ky. (WBKO) -- Tony and Robin Trego's business has done so well, they've expanded to Bowling Green from Owensboro.
Their shop is eCig Source and it sells one of the newest alternatives to cigarettes, electronic cigarettes.
"Most of them have a button you push like this, you push that it activates the battery to the coil and you just draw on it like a regular cigarette. When you breathe it out actually it's another good thing, there is no second hand with an electronic cigarette because when you breathe it in, you absorb the nicotine and what you're breathing out is just pure water vapor," said eCig Source Owner Tony Trego.
Trego said a solution is heated to make vapor unlike a cigarette where a flame is needed.
Proponents of e-cigs say this is a safe alternative to smoking because of the ingredients.
"There is not a whole lot in it. All of the ingredients and fluids that we use and most everyone uses, they're all food grade substances. They're all substances you're getting in your everyday life," said Trego.
Dr. Charles Lin is a cardiologist at the Medical Center, and he said for people trying to stop smoking, e-cigs are a good idea.
"If you want to quit cigarettes and go into e-cigarettes, your chances of having increased cardiovascular events do not increase," said Dr. Lin.
E-Cigs are currently not FDA approved, the American Cancer Society is skeptical as well and there is another controversy that centers around them, age.
"With certain populations like the teenagers, with some, the concern is they're smoking e-cigarettes and then they're going to go into the true cigarettes after. So, that's why there is all these controversies going," said Lin.
That's why Trego said he doesn't sell to minors at his store.
Regardless of what you think, the industry will continue on because there are currently very few regulations.
Kentucky legislation has failed in the past to ban e-cigs in public. In Bowling Green, the smoking ban does not include e-cigarettes, so they are allowed.