Medical marijuana legalization is not linked with an increase in ‘problematic cannabis use’, data published in the journal Addiction reveals.

Researchers with Columbia University analyzed cannabis use trends in states with medical marijuana laws in the years after those laws were passed.

They found “no significant change in the prevalence of past-month marijuana use among adolescents or young adults (those ages 18 to 25)” following legalization.

Investigators also found no proof of increased cannabis abuse or dependence by young people or adults. On the other hand, states with largely unregulated medical marijuana programs were tied to more self-reported use by adults over the age of 25, while states with stricter regulations were not.

While these findings match those of several other studies, they contradict a recent and heavily shared paper in JAMA Psychiatry that suggested medical marijuana laws could increase the rate of cannabis use disorder among adults.

h/t NORML Blog