Daily pot use not associated with brain shrinkage: Colorado study

Daily marijuana use is not associated with brain shrinkage when using a like-for-like method to control for the effects of alcohol consumption on those who both drink and toke up, a new study from Colorado has found. The study, led by neuroscientists at the University of Colorado at Boulder and published Jan. 28 in the Journal of Neuroscience, points to continued uncertainty about how pot use alters the structure of the brain. The latest research comes as access to pot is expanding following 2012 ballot measures in Washington state and Colorado that legalized its recreational use, and voter-approved measures last year to do the same in Alaska and Oregon. Kent Hutchison, a clinical neuroscientist at the University of Colorado, Boulder, and the senior author of the study, said his team reviewed a number of scientific papers that showed marijuana causes different parts of the brain to shrink, and his team found the studies were not consistent.



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