Researchers discovered nano-sized toxic metal particles in cannabis vaping liquids before first use, posing safety concerns.

Researchers at the American Chemical Society Spring Meeting found nano-sized toxic metal particles in cannabis vaping liquids even before first use, with unregulated products having worse effects. Cannabis vapes are a new product category in Canada, where regulation and legalization are still growing. This discovery raises concerns about the safety of vaping, despite it being perceived as a safer alternative to smoking.