NCT07348679

Cigarette Filter Study

A Randomized Trial of Charcoal-filtered Cigarettes on Product Perceptions, Smoking Behaviors, and Toxicant Exposure

• Status: Not Yet Recruiting
• Phase: N/A
• Study type: Interventional
• Enrollment: 252 (estimated)
• Sponsor: Rutgers, The State University of New Jersey · Academic / Other
• Sex: All
• Age: 21 Years
• Healthy volunteers: Not accepted

Summary

The overall purpose of this study is to determine the effects of using charcoal-filtered cigarettes on product perceptions, smoking behaviors, and biomarkers of exposure to tobacco-related toxicants. The main questions it aims to answer are: Do perceptions of cigarettes differ by their filter? Do people smoke charcoal-filtered cigarettes differently than cigarettes with conventional filters, and does this change their exposure to cigarette harms? Study participants will complete a 5-week laboratory-based, open-label, parallel-design randomized trial. After a baseline period of smoking their preferred brand, participants will smoke charcoal-filtered or non-charcoal-filtered cigarettes for 4 weeks while completing weekly sessions to assess primary outcomes. During weekly sessions, they will smoke two cigarettes in our laboratory, provide urine and carbon monoxide samples, and complete questionnaires.

Conditions

• Smoking ( Cigarette)

Interventions

Type	Name	Description
BEHAVIORAL	Charcoal filtered cigarettes with marketing	After completing a 7-day baseline period of smoking their own preferred brand, participants randomized to the charcoal filtered cigarette with marketing condition will use Natural American Spirit Sky cigarettes for the next 28 days
BEHAVIORAL	Charcoal filtered cigarette without marketing	After completing a 7-day baseline period of smoking their own preferred brand, participants randomized to the charcoal filtered cigarette without marketing condition will use Tareyton cigarettes for the next 28 days
BEHAVIORAL	Non-charcoal filtered cigarettes	After completing a 7-day baseline period of smoking their own preferred brand, participants randomized to the non-charcoal filtered cigarette condition will use Natural American Spirit Yellow cigarettes for the next 28 days

Timeline

• Start date: 2026-02-15
• Primary completion: 2030-12-31
• Completion: 2030-12-31
• First posted: 2026-01-16
• Last updated: 2026-01-16

Locations

1 site across 1 country: United States