E Cigarette or Vaping Product Use Associated Lung Injury: A Comprehensive Review New strong evidence that Juul is more toxic to lungs and hearts than earlier e cigs Stanton Glantz blog Experts warn that flavored e cigarettes can cause irreversible lung damage, as seen in a U.S. teenager who developed "popcorn lung"a severe and permanent condition called bronchiolitis obliteransafter secretly vaping for three years. E cigarettes cause lung condition known as EVALI : Revista Pesquisa Fapesp