A new study from Amsterdam challenges the traditional view that cannabis harms cognitive function. It found that the age men start smoking cannabis has no significant effect on cognitive decline later in life, and frequent adult users do not experience greater cognitive decline than non-users. Analyzing over 5,000 men, the results interestingly indicated that cannabis smokers showed slightly less decline in mental abilities than non-smokers. This study adds to a growing body of evidence suggesting that cannabis may not have the harmful cognitive effects previously assumed, although its findings are limited by a lack of female participants.
The study found that age at which men start smoking has no negative impact on cognitive decline, and frequent adult cannabis users face no greater long-term decline.
Interestingly, the research revealed that those who smoke cannabis displayed slightly less mental decline than non-smokers, by an average of 1.3 IQ points.
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