Breath tests reveal how cannabis and tobacco differently impact lungs
NCT ID NCT07694466
First seen Jul 10, 2026 · Last updated Jul 10, 2026
Summary
This study compares the immediate effects of inhaling cannabis (either smoked or vaporized) versus tobacco cigarettes on lung health. Researchers will measure breath biomarkers—such as exhaled nitric oxide, volatile organic compounds, and other substances—to see how each substance affects the lungs. The study involves 12 healthy adults who are current recreational cannabis users and also smoke tobacco. Findings may help identify unique breath markers for cannabis versus tobacco exposure.
What this could mean
Our plain-language read of the trial. This is informational only — not medical advice or a prediction.
- Active substance
- Cannabis (THC) and Tobacco
- What this could lead to
- If successful, this could help identify specific breath biomarkers that distinguish the lung effects of cannabis from tobacco, informing future health guidelines.
- What could go wrong
- This is a very small early-phase study (12 participants) and only measures immediate effects, not long-term health outcomes. Results may not apply to heavier or more diverse users.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Get updates
Get notified about this study
Sign up to get updates when this study changes or when new studies for BIOMARKERS are added.
By submitting, you agree to our Terms of use
Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Show contact details
Enter your email to view the contact information for this study.
By submitting, you agree to our Terms of use
Study contacts
-
Contact
Phone: •••-•••-•••• Email: •••••@•••••
Locations
-
University of Kentucky
Lexington, Kentucky, 40508, United States
More trials for these conditions
Other studies related to the condition(s) this trial covers.
- Can a simple guide help clinicians better address youth substance use?
- Can a common nerve pain drug restore brain chemistry in bipolar cannabis users?
- Zirconia vs titanium: which dental implant heals bone better?
- Heated tobacco devices tested as a tool to help smokers kick the habit
- Can a Parent-Talk program curb college drinking and cannabis use?
- Saliva may reveal hidden links between bone loss and tooth decay