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.
April 2012 in “J. Willard Marriott Library” Cannabinoids like THC and THCA get into hair through skin oils, not hair color.
Forensic hair analysis for drugs is now more reliable and accurate.
October 2025 in “JCI Insight” Rosemary extract helps skin heal faster by activating a specific receptor.
November 2025 in “International Journal of Applied and Experimental Biology” Hemp shows promise for skincare and hair care due to its therapeutic properties, but standardization and clinical evidence are needed.