There’s more evidence that marijuana does not, in fact, lead to harder drug use.

marijuana use might not be as dangerous as some critics of the drug fear

A new study from Emory University researchers looked at federal surveys and states that legalized medical marijuana to evaluate the impact of legalization on marijuana and other drug use. Researchers found medical marijuana legalization led adults 21 and older to use more marijuana, but the increase did not lead people to try harder drugs.

The study has several implications for states that are considering whether to legalize marijuana for recreational or medical purposes. For one, it suggests relaxed marijuana laws can lead to more regular marijuana use, although not among teenagers. But the study also indicates that marijuana use might not be as dangerous as some critics of the drug fear.