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Analysis: Hair Follicle Testing Detects Passive Exposure to Cannabis Smoke
July 17, 2025
WASHINGTON, July 17 [Category: Sociological] -- The National Organization for the Reform of Marijuana Laws posted the following news release:

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Analysis: Hair Follicle Testing Detects Passive Exposure to Cannabis Smoke

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Bologna, Italy: Subjects exposed to second-hand cannabis smoke, even for brief periods, can test positive for THC on a hair follicle test, according to data published in the journal Forensic Science International.

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