Lung Health and Breath Biomarkers: Acute Effects of Combusted and Vaporized Cannabis Inhalation Compared to Tobacco Cigarette Combustion in the Human Laboratory

Inclusion Criteria: 1. English-speaking, 2. Literate adults, 3. Male or female, 4. Between the ages of 18 and 55, 5. Body Mass Index from 18.5 and 32.0 kg/m2, 6. Able to provide written informed consent and perform all study procedures, 7. Current recreational cannabis users - must report past 30-day cannabis use and at least 5 exposures in the past year (minimum use criteria); no limit on maximum use, 8. Past year history of vaporized or smoked cannabis use to intoxication, 9. Past 30-day use of combusted tobacco, 10. Not currently seeking treatment for cannabis, tobacco cigarettes, or other…