Clinical Research Directory

Inclusion Criteria: * Young adult susceptible non-users aged 18-24 who have never used ONPs and have never used but are susceptible to using either: * combustible tobacco only (cigarettes, cigars, waterpipe) * non-combustible tobacco only (ST, ECs, heated tobacco products) * or both combustible and non-combustible tobacco (i.e., dual susceptibility) * Adult tobacco users aged 18-65 who have never used ONPs OR have used ONPs \>3 months ago and 10 times or less in their lifetime. All adult tobacco users must also be: * exclusive combustible tobacco users * exclusive non-combustible tobacco users * dual users * For adult tobacco users, we will define current use as use of combustible and/or non-combustible tobacco every day or some days for 6 months or longer * Willing and able to complete an in-person lab visit. Exclusion Criteria: * Age \< 18 or \> 65 * Are not susceptible non-users or current tobacco users * Are unwilling or unable to complete and in person lab visit. * Have used ONPs within the past 3 months * Have used ONPs more than 10 times in their lifetime