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what legal cannabis does to your brain: Researchers seek answers

For those suffering depression or anxiety, using cannabis for relief is an answer


                                  



according to new research from a team at Colorado State University seeking scientific clarity on how cannabis -- particularly chronic, heavy use -- affects neurological activity, including the processing of emotions.
Researchers led by Lucy Troup, assistant professor in the Department of Psychology, have published a study in PeerJ describing their findings from an in-depth, questionnaire-based analysis of 178 college-aged, legal users of cannabis. Recreational cannabis became legal in Colorado in 2014. Since then, seven other states have enacted legalization for recreational use, while many others allow medical use.


"One thing we wanted to focus on was the significance of Colorado, the first state to legalize recreational cannabis, and its own unique population and use that occurs here," Troup said.
Through the study, which was based solely upon self-reported use of the drug, the researchers sought to draw correlations between depressive or anxious symptoms and cannabis consumption.

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They found that those respondents categorized with subclinical depression, who reported using the drug to treat their depressive symptoms, scored lower on their anxiety symptoms than on their depressive symptoms - so, they were actually more depressed than they were anxious. The same was true for self-reported anxiety sufferers: they were found to be more anxious than they were depressed.
In other words, "if they were using cannabis for self-medication, it wasn't doing what they thought it was doing," explained co-author Jacob Braunwalder, a recently graduated student researcher in Troup's lab.
Study co-author Jeremy Andrzejewski led the development of the questionnaire, called R-CUE (Recreational Cannabis Use Evaluation), that took a deep dive into users' habits, including questions about whether users smoked the drug, or consumed stronger products like hash oils or edibles. The researchers are particularly motivated to study biochemical and neurological reactions from higher-tetrahydracannabinol (THC) products available in the legal market, which can be up to 80-90 percent THC.

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The researchers are quick to point out that their analysis does not say that cannabis causes depression or anxiety, nor that it cures it. But it underscores the need for further study around how the brain is affected by the drug, in light of legalization, and by some accounts, more widespread use in Colorado since legalization.



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