Researchers collected popular disposable vape devices from users and from discarded products in Southern California. They compared the leftover liquid in used devices with fresh, unused versions of the same brands and flavors. The study was published in ACS Omega.
The team focused on aldehydes, chemicals that form when vape liquids are heated. Levels of several aldehydes, including formaldehyde, increased after devices were used. In laboratory tests, exposure to these used fluids caused measurable damage to human lung cells.
The researchers say that high‑puff disposable vapes can build up harmful byproducts and that users should be cautious as devices near the end of their life.
Difficult words
- disposable — made to be used once then thrown away
- discard — thrown away or left as trashdiscarded
- aldehyde — a type of chemical often from heated liquidsaldehydes
- leftover — remaining part after most is used
- exposure — contact with a substance or condition
- byproduct — an extra chemical made during a processbyproducts
Tip: hover, focus or tap highlighted words in the article to see quick definitions while you read or listen.
Discussion questions
- Would you be cautious using a disposable vape near the end of its life? Why or why not?
- How could used vape liquids harm the lungs, based on the article?
- Have you seen discarded vape devices in your area? What did you do or what should people do with them?
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