Glossary
THC-COOH
The inactive cannabis metabolite (11-nor-9-carboxy-THC) targeted by most urine cannabis tests.
Last updated:THC-COOH is the principal urinary metabolite of Δ9-THC. Because it is lipid-soluble and stored in body fat, it can persist for days in occasional users and several weeks in daily, heavy users — long after any psychoactive effect has ended.