Elevated Toxic Element Emissions from Popular Disposable E‑Cigarettes: Sources, Life Cycle, and Health Risks.
Level 5 - mechanism / opinion, no new human data
Bench and analytical laboratory investigation with toxicological risk assessment; no human participants.
PubMed 40893954 · doi:10.1021/acscentsci.5c00641
What was done
Researchers measured emissions of toxic metallic elements in aerosols and e-liquids across flavored and unflavored versions of three disposable e-cigarette brands (Esco Bar, Flum Pebble, and ELF Bar). They tracked element concentrations over device lifecycles, performed chemical speciation of chromium and antimony, identified device material sources, and modeled cancer and noncancer toxicological risk thresholds.
What was found
Coil-derived elements (chromium and nickel) increased up to 1000-fold in concentration over device lifecycles. Esco Bar devices showed high maximum concentrations of lead (up to 175 ppm), nickel (up to 38 ppm), copper (up to 546 ppm), and zinc (up to 462 ppm) in both e-liquids and aerosols. Illicit leaded bronze in nonheating components contacting e-liquid was identified as the lead source. Speciation detected chromium as nontoxic Cr-(III) and antimony as a mixture of nontoxic Sb-(V) and carcinogenic Sb-(III). Cancer risks (Ni, Sb-(III)) and noncancer toxicity risks (Pb, Ni) exceeded established safety thresholds.
Why it matters
This study shows that popular disposable e-cigarettes expose users to high concentrations of toxic heavy metals due to manufacturing defects and coil breakdown. It highlights a critical regulatory failure in device component safety and material standards.
Limits
The study is limited to laboratory device testing without human biomonitoring or clinical outcome evaluation. The exact number of individual devices tested was not reported in the abstract, and the material source for elevated antimony could not be identified.
Cited by
- supports A single disposable vape can release more lead in one day of use than smoking 20 packs of cigarettes.