DNA damage levels similar in vapers and smokers, study finds E cigarettes cause 'significantly less damage to our DNA than cigarettes' A new study has revealed that vaping damaged the DNA of its users in a similar way to smokers who develop cancer. A tea of researchers at University College London found that Prolonged heavy vaping may give you cancer, scientists say South China Morning Post Is Vaping Bad For You? Side Effects, Risks, Nicotine, Marijuana