The government recently loosened medical marijuana rules. Experts separate fact from fiction about the drug’s safety and ...

Doctors who work with adolescents say some young people are self-medicating with cannabis, even though there’s no evidence it ...

Adolescents in California consistently perceive cannabis as less harmful than other commonly used substances, according to a new study analyzing data from two large statewide school surveys.

New research from UC San Diego sheds light on how cannabis affects youth and their ability to maintain attention, react and retain information.

Youth cannabis use between ages 9 and 17 years is associated with slower cognitive development during a time of key brain development.

A new UC San Diego study strengthens the growing body of evidence that marijuana use impacts adolescent brain development. Researchers observed slower gains in cognitive tests that measured memory, ...

Cannabis use among Minnesota teens has dropped sharply over the past decade, according to new statewide data. The 2025 ...

In a typical North Carolina middle or high school classroom of 25 students, roughly two meet the criteria for substance use ...

While teen tobacco use in Michigan remains far below historic highs, data shows it’s beginning to rise again, fueling renewed calls to boost prevention spending that has fallen far short of federal ...

SAN DIEGO — Researchers at UC San Diego have released findings from the largest long-term study of its kind in the U.S., revealing that adolescents who use marijuana show slower gains in critical ...

The analysis also examined safety concerns. Long-term studies in adolescents showed that high-potency cannabis may be associated with higher rates of psychotic symptoms (12.4% versus 7.1% for ...

Teens who start using cannabis show slower gains in memory, attention and thinking skills over time compared to non-users. THC exposure was linked to worse memory over time, highlighting potential ...