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A new study, published in Neurobiology of Disease, states that daily consumption of marijuana (cannabis) in teens can cause depression and anxiety, and have an irreversible long-term effect on the brain.

According to Dr. Gabriella Gobbi, a psychiatric researcher from the Research Institute of the McGill University Health Centre, the damaging effects of marijuana on young brains are worse than originally thought.

“We wanted to know what happens in the brains of teenagers when they use marijuana and whether they are more susceptible to its neurological effects than adults,” stated Dr. Gobbi.

Her study points to an apparent action of marijuana on two important compounds in the brain — serotonin and norepinephrine — which are involved in the regulation of neurological functions such as mood control and anxiety.

“Teenagers who are exposed to marijuana have decreased serotonin transmission, which leads to mood disorders, as well as increased norepinephrine transmission, which leads to greater long-term susceptibility to stress,” Dr. Gobbi stated.

This is the first study to demonstrate that marijuana consumption causes more serious damage during adolescence than adulthood. This research was funded by a grant from The Canadian Psychiatric Research Foundation (CPRF).

Also, Dr. CE Gant, author of End Your Addiction Now, states the following: “The use of marijuana by children and adolescents can have profound negative consequences for brain development and lead to long-term intellectual and emotional dysfunction”. It stunts brain growth and development.

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