30 citations
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March 2012 in “Journal of Analytical Toxicology” THCCOOH levels in hair decrease from root to tip and don't match well with self-reported cannabis use.
December 2018 in “J. Willard Marriott Library” Cannabinoids like THC and THCA get into hair through skin oils, not hair color.
3 citations
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December 2022 in “Cells” Cannabinoids like CBD and THC may help treat non-cancer skin diseases, but more research is needed.
March 2025 in “Journal of Dermatological Treatment” Cannabis users may need higher anesthetic doses during hair restoration surgery.
Forensic hair analysis for drugs is now more reliable and accurate.