Cannabis damages young people’s ability to retain information and do well in class, a study suggests.
Just a week after giving up the drug, participants aged 16 to 25 were far more likely to remember lists of new words than those still using it.
The memory test results provide yet more evidence for the damage cannabis does to developing brains.
The researchers, led by Harvard Medical School, said the drug may damage memory centres such as the prefrontal cortex. Lead author Dr Randi Schuster, of Harvard’s Centre for Addiction Medicine, said: ‘We can confidently say that these findings strongly suggest that abstaining from cannabis helps young people learn, while continuing cannabis use may interfere with the learning process.’
Among 88 teenagers and young adults who used cannabis at least once a week, 55 came off it for a month.