Nicotine e-cigarettes reduce harmful chemical exposure and help smokers quit, study finds

Cigarette smoking is the leading preventable cause of death in the United States, even as rates of cigarette smoking have fallen to an all-time low of approximately 10% in 2024. Some studies suggest that electronic cigarettes (e-cigarettes) help people quit smoking and expose them to fewer harmful chemicals—but products have changed rapidly, and it's unclear whether these benefits still hold true.