Chemicals in e cigarettes mix together to form new, unexpectedly toxic compounds EurekAlert! Before you take another puff, know what's inside. E cigarettes contain thousands of toxic chemicals. Ready to quit smoking? Text READY to 34191 All E Cigarettes Emit Harmful Chemicals, but Some Emit More Than Others Berkeley Lab Berkeley Lab News Center Comparison of the chemical composition of aerosols from heated tobacco products, electronic cigarettes and tobacco cigarettes and their toxic impacts on the human bronchial epithelial BEAS 2B cells ScienceDirect A Comprehensive Review of the Harmful Compounds in Electronic Cigarettes Estimated mass of flavoring chemicals in e cigarettes (g e cigarette) Download Table