According to CBS News, new research published in the New England Journal of Medicine has found that e-cigarette vapor may contain 15 times more formaldehyde than regular cigarettes. Initially it was believed that e-cigarettes would not contain any cancer-causing chemicals, but newer devices which can operate at very high temperatures allow for the creation of formaldehyde containing compounds. When the vapor devices were used at the typical 3.7 volt setting, formaldehyde levels were on par with the levels released by an FDA approved smoking cessation inhaler. When the power was increased to 5 volts, researchers experienced extreme overheating and increased formaldehyde production. These findings highlight how little is really known about e-cigarettes, and create a stronger case for FDA oversight of the industry.