No significant causal links between cannabis legalization and substance-use disorders were found in this study on twins. Once again the gateway theory—the belief that cannabis use leads...
The U.S. is seeing an increase in marijuana use that can be attributed to legalization for recreational purposes, a recent study in the journal Addiction shows. Those living...
In reviewing data about twins, researchers found that cannabis use increased for those who lived in a recreational cannabis state versus one that has not yet...