High-potency pot smokers show brain-fiber damage
More THC associated with weakness in white matter linking cerebral hemispheres
People who use especially potent pot show signs of damage in a key part of their brain. The results, reported online November 27 in Psychological Medicine, are limited, though: The small brain scanning study doesn’t show that marijuana caused the brain abnormality — only that the two go hand-in-hand. But the findings suggest that potency matters, says study coauthor Tiago Reis Marques, a psychiatrist at King’s College London.
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