Although the vapor from e-cigarettes is not likely to be as bad as the smoke from burning tobacco, there are concerns because these products are not regulated. There are many differences between e-cigarette makers, and a lot of safety questions haven’t been answered yet. Even if it turns out that they’re otherwise low-risk, e-cigarettes can hook kids on nicotine. They can still create a lifelong nicotine addiction that could lead to the use of more harmful tobacco products.