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Study: Cannabis and Tobacco Users Face Brain Chemistry Changes

10/22/2025

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Summary

Story summary

McGill University researchers found that people who use both cannabis and tobacco show brain chemistry differences versus cannabis users.
The study notes elevated fatty acid amide hydrolase (FAAH), the enzyme that degrades anandamide.
An increased FAAH is linked to greater anxiety, depression, and difficulty quitting cannabis.
The study involved 13 young adults, including five dual users.

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Story summary

McGill University researchers found that people who use both cannabis and tobacco show brain chemistry differences versus cannabis users.
The study notes elevated fatty acid amide hydrolase (FAAH), the enzyme that degrades anandamide.
An increased FAAH is linked to greater anxiety, depression, and difficulty quitting cannabis.
The study involved 13 young adults, including five dual users.