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16h ago

Disposable E-Cigarettes Release Higher Levels of Toxic Metals Than Traditional Cigarettes

Published in ACS Central Science, UC Davis researchers documented escalating emissions of lead, nickel and antimony over device lifespans, prompting urgent calls for stricter regulation.

UC Davis researchers found some disposable vapes emit more toxic metals — including lead and nickel — than traditional cigarettes.
UC Davis researchers Mark Salazar (left) and Brett Poulin in a lab with disposable vape pods. Their study found some disposable vapes emit more toxic metals — including lead and nickel — than traditional cigarettes.
UC Davis researcher Mark Salazar in a lab with disposable vape pods. Their study found some disposable vapes emit more toxic metals — including lead and nickel — than traditional cigarettes.

Overview

  • Some disposable devices emitted higher levels of lead, nickel and antimony than older refillable e-cigarettes and conventional cigarettes, with one model releasing over 20 packs’ worth of lead in a single day.
  • Researchers tested seven models from three popular brands, simulating 500–1,500 puffs per device to measure changes in metal and metalloid concentrations.
  • Lead contamination was traced to leaded copper alloys in non-heating components, while heating coils and unused e-liquids contributed nickel and antimony to the vapor.
  • Vapors from multiple devices exceeded cancer risk limits for nickel and antimony and surpassed safety thresholds for neurological and respiratory hazards.
  • Despite lacking FDA marketing authorization, disposable e-cigarettes remain widely available in the U.S., underscoring gaps in enforcement and oversight.