Nicotine levels are rising among teens who vape, new study warns

MedicalXpress | juil. 31, 2026

Vape devices are flooding teens' bodies with increasingly heavy doses of addictive nicotine, a new study finds. Average urine levels of a key nicotine metabolite, cotinine, nearly tripled among teenagers over a period of a few months in late 2024, researchers report in JAMA Psychiatry.