Marijuana Addiction Linked to Genetics

People with certain genetic markers may be at higher risk for marijuana dependence, a new study suggests. Researchers found a link between three genetic markers and symptoms of marijuana dependence, a condition in which people can't stop using the drug even though it interferes with many aspects of their lives, such as their relationships or their jobs. What's more, the study showed some overlap between the genetic risk factors for marijuana dependence and the genetic risk factors for depression