Cannabis metabolites are the compounds your body creates after it breaks down THC, CBD, and other cannabinoids. The two that matter most in drug testing are 11-hydroxy-THC (11-OH-THC), which is psychoactive, and THC-COOH, an inactive acid that labs look for in urine. Tests detect metabolites, not the plant itself, which is why a urine screen can stay positive for days or weeks after the last dose.
What Are the Main Cannabis Metabolites?
Each cannabinoid follows its own path through the liver, and each one leaves a different set of markers behind.
- THC to 11-OH-THC: CYP2C9 and CYP3A4 enzymes add a hydroxyl group. This metabolite enters the brain and produces stronger effects than THC itself.
- 11-OH-THC to THC-COOH: a second oxidation step turns the molecule inactive. THC-COOH is the standard target of urine immunoassays.
- CBD to 7-OH-CBD and CBD-COOH: CBD is processed by CYP2C19 and CYP3A4, then cleared as glucuronide conjugates.
- CBN, CBG, and THCV: minor cannabinoids form their own acids and hydroxy compounds, and modern panels can measure several of them at once.
Which cannabis metabolite gets you high?
11-OH-THC does. It binds CB1 receptors with higher affinity than delta-9 THC, and it shows up in larger amounts after oral use. THC-COOH does not get you high, but it stores in fat tissue and appears in tests long after the effect fades.
How Does the Body Process THC Step by Step?
- Inhaled THC reaches the bloodstream in seconds. Swallowed THC absorbs through the gut.
- The liver runs the molecule through CYP2C9, CYP3A4, and CYP2C19.
- 11-OH-THC forms first. It is active and drives part of the edible high.
- A second pass converts it to THC-COOH.
- Glucuronidation attaches a sugar molecule so the metabolite can leave through urine or bile.
Smoking and vaping send THC straight to the blood, so less of it meets the liver on the first pass. Edibles do the opposite. Oral THC passes through the liver before it reaches circulation, so a larger share converts to 11-OH-THC, which helps explain why edible effects feel stronger and last longer.
How Long Do Cannabis Metabolites Stay Detectable?
Detection windows depend on dose, frequency, body fat, and the sensitivity of the test.
- Urine: about 3 days after one use, up to 30 days for chronic users.
- Blood: 1 to 2 days for THC and 11-OH-THC, longer for THC-COOH.
- Saliva: 1 to 3 days.
- Hair: up to 90 days.
These are ranges, not rules. Body fat, hydration, liver function, and the cutoff level of the assay all shift the number. Users who consume every day and carry more fat mass clear THC-COOH at a slower rate.
Does Convenience Change the Metabolite Picture?
Convenience formats have changed how people consume cannabis, and that changes which metabolites dominate a sample.
Vapes and pre-rolls deliver THC by inhalation, so the parent compound leads in early blood samples. Gummies, beverages, and tinctures travel through the gut and liver, which raises the 11-OH-THC ratio. A 10 mg gummy and a few inhalations can produce different metabolite profiles even when the THC dose looks the same.
Convenience also pushes toward repeated small doses. Frequent low-dose use keeps THC-COOH present without a heavy peak, so a person may test positive while feeling no effect at all.
What Do Labs Test For?
Standard urine screens use an immunoassay that reacts to THC-COOH. A positive screen is presumptive, so a lab confirms it with GC-MS or LC-MS/MS, which can separate THC, 11-OH-THC, THC-COOH, and their glucuronides.
Newer panels add CBD metabolites such as 7-COOH-CBD, plus markers for synthetic cannabinoids. This matters for people using CBD products who worry about a THC positive. Pure CBD does not convert to THC-COOH in the body, but full-spectrum products can carry trace THC.
Can you flush cannabis metabolites?
Not in a reliable way. THC-COOH is stored in fat and released at its own pace, so water, exercise, and detox kits change little in the short term. Dilution can drop a urine concentration below the cutoff, but labs flag samples with creatinine levels that are too low.
Common Questions About Cannabis Metabolites
Are cannabis metabolites the same as cannabinoids?
No. Cannabinoids are the compounds found in the plant, such as THC and CBD. Metabolites are what the body makes from them.
Do metabolites show up in hair tests?
Yes. THC-COOH and related compounds deposit in the hair shaft as it grows, which gives a detection window of up to 90 days.
Can secondhand smoke cause a positive metabolite test?
It can, though this is rare. Heavy exposure in a closed space may push a sensitive assay over the cutoff, and confirmatory testing with a lower limit can detect it.
Does CBD turn into THC in the body?
No. Human digestion does not convert CBD to THC in amounts that matter. Any THC-COOH found after CBD use comes from THC in the product, not from CBD itself.