Vaping harms your health Cancer Institute NSW Vaping Possible Negative Effects on Lungs: State of the Art From Lung Capacity Alteration to Cancer Cureus A new study has found that when the main ingredient in most e cigarette fluids is heated, it forms two toxic chemicals capable of harming human lung cells. The research, published in Frontiers E Cigarette or Vaping Product Use Associated Lung Injury: A Comprehensive Review