Elsevier Jul 2 2025 Novel research has revealed that adolescent vaping of current delta-9-tetrahydrocannabinol (THC), cannabidiol (CBD), and synthetic cannabinoids (SCs) has increased between 2021 and 2023. Also, adolescents are increasingly unsure about the substances they vaped in their e-cigarettes. A new study appearing in the American Journal of Preventive Medicine , published by Elsevier, sheds light on this alarming trend and contributes to informing evidence-based public health policies