Yes, vapes can contain lead, and in some cases at levels that exceed health-risk thresholds. The lead doesn’t come from the e-liquid itself but from the metal components inside the device, particularly heating coils and solder joints made with leaded bronze alloys. As the coil heats up and the liquid sits in contact with these metals, lead leaches into the liquid and gets carried into the vapor you inhale.
Where the Lead Comes From
The heating coil is the primary culprit. When it reaches operating temperatures of 150 to 250°C for nicotine vapes (higher for cannabis devices), metals from the coil and surrounding components dissolve into the e-liquid. Leaded bronze alloy parts in some devices leach both nickel and lead directly into the liquid before it’s even vaporized. The type of coil matters: higher-resistance coils tend to produce finer particles and release more lead, aluminum, chromium, and nickel into the aerosol compared to lower-resistance sub-ohm coils.
This isn’t a one-time release. The longer e-liquid sits in contact with metal components, the more contamination builds up. Research has shown that devices stored for seven months had significantly higher lead levels than those stored for just three weeks. Higher storage temperatures accelerate the process. So a vape that’s been sitting on a shelf or in a hot car for months before you buy it may already have elevated lead in the liquid before you take a single puff.
How Much Lead Is in the Vapor
Lead levels vary enormously between brands and device types. A 2025 study published in ACS Central Science tested several popular disposable brands and found striking differences. Esco Bar devices contained lead concentrations up to 175 parts per million in their e-liquids and aerosols, with aerosol levels between 100 and 200 puffs reaching as high as 51,900 micrograms per kilogram. ELF Bar and Flum Pebble devices tested in the same study had lead levels roughly 10 to 1,000 times lower.
To put those higher numbers in perspective: noncancer risk assessments from the study found that lead emissions from several of the tested devices exceeded the health quotient (the threshold below which exposure is considered safe) by up to four times. Nickel emissions were even worse, exceeding the safe threshold by up to nine times.
Disposable Vapes Are the Biggest Concern
Disposable e-cigarettes release markedly higher amounts of metals into vapor than older, refillable vape systems. One disposable device tested by researchers at UC Davis released more lead during a single day’s use than nearly 20 packs of traditional cigarettes. That comparison is worth sitting with: a product often marketed as a safer alternative to smoking can deliver far more lead exposure than cigarettes themselves.
The reason disposables tend to be worse comes down to construction quality. These are cheap, single-use devices built with inexpensive metal alloys. There’s no incentive for manufacturers to use higher-grade materials in a product designed to be thrown away. Refillable systems, while not lead-free, generally use better components and allow users to replace coils, which can reduce long-term metal buildup.
Why Coil Age Matters
The relationship between coil age and lead exposure is counterintuitive. Fresh coils actually appear to release more metals than broken-in ones. Research shows that a coating builds up on the coil surface over time, which can reduce the rate of metal leaching. Studies on refillable devices found that users who changed their coils more than twice a month had higher metal concentrations in both their e-liquid and the aerosol they inhaled, likely because each new coil goes through a high-leaching break-in period.
For disposable vapes, this dynamic plays out differently. Testing found that metal concentrations in the aerosol were highest during the first 100 to 200 puffs, then gradually declined over the life of the device. That means the early puffs from a fresh disposable deliver the biggest dose of lead and other metals.
What Inhaling Lead Does to Your Body
Lead is a well-established neurotoxicant with no safe level of exposure. When you inhale lead particles, they reach the lungs and can cross into the bloodstream, eventually reaching the brain. Research has linked atmospheric lead exposure through respiration directly to brain functional impairment, providing evidence that breathing in lead particles is a direct pathway for the metal to enter the central nervous system.
The health risks from lead and nickel emissions in vape aerosols go beyond cancer. Four of the devices tested in the UC Davis study had emissions that surpassed thresholds for neurological damage and respiratory disease. Chronic low-level lead exposure is associated with cognitive decline, mood disorders, kidney damage, and cardiovascular problems. These effects accumulate over time, meaning daily vaping with a high-lead device compounds the risk with every use.
Not All Devices Are Equal
The thousand-fold difference in lead levels between brands tested in the same study makes one thing clear: the device you choose matters enormously. A few factors influence how much lead you’re exposed to:
- Device type: Disposables generally release far more metals than refillable systems.
- Brand and build quality: Cheap alloys in heating elements and solder joints are the primary source of contamination. Some brands use materials that leach dramatically more lead than others.
- Coil resistance: Higher-resistance coils tend to produce more lead in the aerosol.
- Storage conditions: Devices stored longer or at higher temperatures accumulate more lead in the liquid before you even start using them.
- Temperature and voltage: Higher power settings push coils to higher temperatures, increasing metal leaching. Coils can exceed 600°C in some variable-voltage devices, and running a coil with low liquid levels drives temperatures even higher.
The lack of consistent manufacturing standards means there’s no reliable way for consumers to know how much lead a specific device contains before using it. Independent testing has repeatedly shown that what’s inside these devices varies wildly, even between units of the same brand.