Those who had smoked cannabis before the age of 16 had a thinner cerebral cortex – the outermost layer of the brain – than those who had not, Canadian researchers discovered. Those who had smoked cannabis before the age of 16 had a thinner cerebral cortex – the outermost layer of the brain – than those who had not, Canadian researchers discovered.
Smoking cannabis could damage lining of smokers’ brains, research suggests amid fears over use of drug among teenagers
