Teens who smoke weed are 60% less likely to graduate high school or get a degree according to a study published in Lancet Psychiatry.

The study looked at dagga from around 3 765 participants from Australia and New Zealand to try and establish what effect weed smoking had on academic proficiency.

“Our results provide strong evidence that the prevention or delay of cannabis use is likely to have broad health and social benefits,” said study author Dr Edmund Silins.

If you’re concerned about the long term impacts weed on your health, check out our special report Is Weed Blunting Your Brain.