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New Study Says Abusing Cannabis Accelerates Premature Aging of the Brain

What is being called the largest study on brain imaging ever done has made some troubling consequences of heavy cannabis consumption.

A group of researches from Amen Clinic, Google, John’s Hopkins University, University of California, Los Angeles and the University of California, San Francisco investigated 62,454 single-photon emission computed tomography (SPECT) brain scans taken from over 30,000 people to find out what speeds up brain aging. As a person ages, blood flow to the brain is restricted and certain medical conditions and habits can further reduce blood flow.

The top cause of brain aging was schizophrenia, which on average added four years to a person’s brain age. Other medical conditions also ranked high on the list with bipolar disorder adding an average 1.6 years and ADHD adding 1.4. However, drug abuse also weighed heavily on a person’s brain age with cannabis use disorder adding 2.8 years and alcoholism adding 0.6.


Drivers of Brain Aging. Credit: Daniel G. Amen

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Published: December 30, 2018

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