Some people may be more genetically prone to cannabis addiction, finds a new study. The researchers say their investigation of three genetic markers could inform why some people become dependent of cannabis, and that it's easy to test for these genetic variants, but more research is needed.

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Some people may be more genetically prone to cannabis addiction, finds a new study. The researchers say their investigation of three genetic markers could inform why some people become dependent of cannabis, and that it's easy to test for these genetic variants, but more research is needed.