Marijuana Use Shrinks Key Part of Brain

Regular cannabis use shrinks the brain but increases the complexity of its wiring, a study has found. The loss of brain volume is balanced to some extent by more connections between neurons, scientists discovered.

The study of cannabis users through brain scans is one of the first to investigate the drug’s long-term impact.

The team studied 48 adult cannabis users aged 20 to 36 who were compared with a group of matched non-users. On average, the cannabis users took the drug three times a day.

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