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Columnist: Brigitte-Fanny Cohen A study conducted in the United States, at Massachusetts General Hospital, shows that one month of abstinence for a regular cannabis user is enough to immediately improve their memory. This study was conducted on young people aged 16 to 25, smoking cannabis at least once a week. The researchers asked half of them to stop using it and the other half to continue their habits. From the first week, they noticed a clear improvement in memory in those who no longer used it. The latter remembered new information more easily and could easily recall it. In the other group of young people, there was no improvement. This study is very encouraging because regular cannabis users are often in the middle of a school or university learning period. For them, cannabis use is particularly harmful because it can harm the success of their studies. Finally, the consequences of cannabis are not inevitable: if you stop in time, progress is entirely possible. Let us remember that cannabis affects 40% of adolescents under 17, with an average first experience at 15 years old.