Nicotine use among young people is evolving. New research shows more youth are using multiple nicotine products at the same timemost commonly cigarettes and e cigarettes, with a growing rise in combining vapes Most e cigarettes contain nicotine, which is highly addictive. Putting maximum limits on the nicotine strength of e cigarettes, along with evidence based tobacco control strategies, may help reduce youth e cigarette use and increase quitting XSLFO Scientists Wanted: Recruited by Juul, Many Researchers Say No The New York Times