A youth’s brain is still under construction until the early 20s. Weed messes with your memory and even the way your brain is shaped.
Regular marijuana use by youth may contribute to losing 3 to 6 IQ points; heavy and frequent use can lower the IQ by 8 points (the difference between being a manager and having a minimum wage job).
Studies link heavy use to lower life satisfaction, poor friendships, and crime. It negatively impacts school achievement, and the chance of getting a good job, earning good money, and having good relationships.