THRIVE Study: Understanding How Oral Nicotine Pouches Affect Public Health

Inclusion Criteria: * Age 21 or older * Able to read and speak English * Willing to abstain from tobacco, nicotine, and marijuana for at least 12 hours prior to study visits * Exclusive use of ONPs (other product use \<10x/mo). * Exhaled CO reading \<10 ppm * Owns a smartphone and can receive SMS text messages with embedded survey links * Negative pregnancy test at V1 and V2 (if applicable) * Uses ≥1.5 cans of ONPs/week * Daily use of ONPs for the past 3 months * At least half of ONPs used are 6mg nicotine concentration. Exclusion Criteria: * Non-English speaker * Individuals currently pregnant, planning to become pregnant, or breastfeeding are excluded due to potential risks associated with nicotine exposure and study procedures (e.g., blood draws). * Individuals with unstable or significant psychiatric conditions are excluded to minimize risk and ensure reliable participation. * Individuals actively attempting to quit nicotine use are excluded to avoid ethical concerns and ensure that study participation does not interfere with cessation efforts * Non-nicotine users and regular tobacco users are excluded from the clinical trial component to ensure that participants have established use patterns appropriate for assessing ONP use behaviors.