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Updated: Jan 21, 2026

Comparing the Effects of Electronic Cigarette Vapor and Cigarette Smoke in a Novel In Vivo Exposure System
Published on: May 24, 2017
JUUL electronic cigarettes: Nicotine exposure and the user experience
Natalie Nardone1, Gideon St Helen2, Newton Addo1
1Clinical Pharmacology Research Program, Division of Cardiology, Zuckerberg San Francisco General Hospital, Department of Medicine, University of California, San Francisco, 1001 Potrero Ave, San Francisco, CA 94110, USA.
JUUL e-cigarettes expose users to nicotine levels similar to other products. While potentially satisfying for smokers quitting tobacco, JUUL use carries addictive potential and reinforces long-term nicotine habits.
Area of Science:
- Public Health
- Nicotine Addiction Research
- Electronic Cigarette Studies
Background:
- JUUL electronic cigarettes became the most popular e-cigarette in the U.S. by March 2019.
- Limited data existed regarding nicotine exposure, dependence, and user experience with JUUL devices.
Purpose of the Study:
- To investigate nicotine exposure and dependence levels among JUUL users.
- To understand the user experience and perceptions associated with JUUL electronic cigarettes.
Main Methods:
- A community-based study involving 15 JUUL users.
- Data collection included questionnaires, saliva cotinine analysis, and qualitative interviews.
Main Results:
- Nicotine exposure via salivary cotinine was comparable to other e-cigarette and tobacco users.
- Most participants reported low to moderate nicotine dependence.
- Key themes included social influences, appealing device features (size, vapor), satisfaction compared to tobacco cigarettes, and perceived addiction.
Conclusions:
- JUUL devices deliver nicotine similarly to other e-cigarettes but may offer greater satisfaction due to unique features.
- JUUL could be an acceptable option for smokers attempting to quit traditional cigarettes.
- The product has addictive potential and may encourage sustained nicotine use.
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