A new UCLA study found that healthy nonsmokers experienced increased adrenaline levels in their heart after one electronic cigarette (e-cigarette) with nicotine but there were no increased adrenaline levels when the study subjects used an a nicotine-free or empty e-cig.
The findings are published in Journal of the American Heart Association, the Open Access Journal of the American Heart Association/American Stroke Association.
Unlike cigarettes, e-cigs have no combustion or tobacco. Instead, these electronic, handheld devices deliver nicotine with flavoring and other chemicals in a vapor instead of smoke.