A series of recent studies, including the largest U.S. study from UC San Diego, has found significant links between adolescent cannabis use and slower cognitive development. Research indicates that marijuana negatively impacts memory and focus in teens, suggesting that early exposure may result in delayed thinking skills and altered brain structure. The findings reveal complex implications for youth, with many young users believing cannabis is a safer alternative to other substances. Experts stress that cannabis may lead to false memories and impair decision-making abilities, raising concerns about the long-term effects on cognitive health.