Increased JUUL Emissions from Initial Puffs after Removing and Reinserting Pod.

Area of Science:

• Environmental Health
• Toxicology
• Public Health

Background:

• Standard laboratory protocols for electronic cigarette (ECIG) testing may not accurately reflect real-world usage patterns.
• User behaviors, such as the repeated removal and reinsertion of pods, can influence ECIG emissions.

Purpose of the Study:

• To compare JUUL electronic cigarette emissions under different puffing protocols.
• To investigate the impact of pod removal and reinsertion frequency on particulate matter (PM2.5) concentrations.

Main Methods:

• Generated ECIG aerosol using a JUUL device in a controlled chamber.
• Measured real-time PM2.5 concentrations across four experimental conditions.
• Varied the number of JUUL pod removals and reinsertions (0, 1, 4, and 9 times) during 10-puff bouts.

Main Results:

• Mean PM2.5 concentrations increased with the frequency of JUUL pod removal and reinsertion.
• PM2.5 levels ranged from 65.06 μg/m³ (0 removals) to 834.69 μg/m³ (9 removals).
• Pod reinsertion significantly elevated PM2.5 emissions compared to standard protocols.

Conclusions:

• Real-world user behaviors, specifically pod manipulation, lead to higher PM2.5 emissions from JUUL devices.
• Current ECIG testing methodologies may underestimate exposure risks.
• ECIG evaluation should incorporate realistic user behaviors for accurate risk assessment.