This study aims to compare serum cotinine levels in e-cigarette and combustible cigarette
smokers, in an attempt to quantify the potential chronic nicotine addiction risk that e …

Introduction Dual use of electronic cigarettes (e-cigarettes) and combustible cigarettes is a
major public health issue. It is generally accepted that exclusive e-cigarette use is less …

The popularity of electronic cigarettes (e-cigarettes) is rapidly increasing in many countries.
These devices are designed to imitate regular cigarettes, delivering nicotine via inhalation …

Introduction: Electronic cigarettes (e-cigarettes) are purported to deliver nicotine aerosol
without any toxic combustion products present in tobacco smoke. In this longitudinal within …

Importance Use of electronic cigarettes (e-cigarettes) is increasing. Measures of exposure to
known tobacco-related toxicants among e-cigarette users will inform potential health risks to …

Background It is not clear whether, in established vapers, cotinine levels remain stable or
change over time. Methods We enrolled 98 exclusive users of e-cigarettes on websites and …

Metabolites are essential intermediate products in metabolism, and metabolism
dysregulation indicates different types of diseases. Previous studies have shown that …

Background: The relevance of nicotine yields from machine-smoked cigarettes for
quantifying smokers' nicotine intakes and exposure to cigarette toxins has been called into …

Background Cigarette smoking is associated with an increase in cardiovascular disease
risk, attributable in part to reactive volatile organic chemicals (VOCs). However, little is …

Introduction The availability of electronic cigarettes (e-cigarettes) has profoundly changed
the tobacco product landscape. In the United States, almost 6 million adults use both …