Teenagers who smoked a lot of marijuana daily for three years responded shoddily on memory exercises and showed abnormal alterations in brain structure, according to a Northwestern Medicine study.
These abnormalities were recorded two years after the teens stopped using marijuana, possibly indicating long-term effects, and look similar to schizophrenia-related brain abnormalities.
The brains were shaped more abnormally for individuals who began marijuana use at a younger age, according to the reports, which suggest that memory regions of the brain are more susceptible to the drug at earlier ages.
It's not your fault that you can't remember where you put your keys. Just blame it on science and your early pot smoking days. Don't forget about 4:20 later.