Teenagers who begin using cannabis before age 15 face significantly higher health risks in young adulthood, according to new research. The study followed over 1,500 children from birth through young adulthood in Montreal, Canada. Researchers found 60% of teens never used cannabis during adolescence, while 20% started before age 15 and used it at least monthly by age 17. Early, frequent users showed a 51% higher chance of seeking mental health care and an 86% higher risk of needing physical health treatment compared to non-users. “The risk is concentrated among those who start early and use frequently,” says study author Massimiliano Orri at McGill University. Physical problems included respiratory issues, accidents, and injuries. Dr. Ryan Sultan at Columbia University recommends delaying cannabis use until age 25 to minimize long-term health and behavioral risks. (Story URL)