Harvard Scientists Studied the Brains of Pot Smokers, and the Results Don’t Look Good
The science: Similar studies have found a correlation between heavy pot use and brain abnormalities, but this is the first study that has found the same link with recreational users. The 20 people in the “marijuana group” of the study smoked four times a week on average; seven only smoked once a week. Those in the control group did not smoke at all.
“We looked specifically at people who have no adverse impacts from marijuana — no problems with work, school, the law, relationships, no addiction issues,” said Hans Breiter, another co-author of the study.