Cannabis Metabolites: How THC and CBD Break Down

Cannabis metabolites are the compounds your body creates after breaking down cannabinoids such as THC and CBD. THC becomes 11-hydroxy-THC and then THC-COOH, while CBD becomes 7-OH-CBD and 7-COOH-CBD. Those metabolites, not the original plant compounds, are what most drug tests look for.

What Are Cannabis Metabolites?

When you inhale or eat cannabis, cannabinoids enter the bloodstream and pass through the liver. Enzymes there, mainly the cytochrome P450 family, chemically change each molecule so the body can clear it. That process happens in two stages.

how are cannabis metabolites removed from body

Parent cannabinoids: the compounds found in the plant, such as delta-9 THC and CBD.
Phase I metabolites: formed when enzymes add oxygen to the molecule. Some of these stay active in the body.
Phase II metabolites: formed when the body attaches glucuronic acid, which makes the compound water soluble so it can be excreted in urine or bile.

The Main THC Metabolites

11-Hydroxy-THC (11-OH-THC)

This is the first major THC metabolite and the one that gets the most attention. It forms quickly after THC passes through the liver, and it is psychoactive. In fact, 11-hydroxy-THC binds to CB1 receptors and is considered at least as potent as THC itself. Edible users often report a stronger, longer high partly because eating cannabis sends more THC through the liver before it reaches the bloodstream.

THC-COOH (Carboxy-THC)

THC-COOH is the second step in the chain. It is not psychoactive, but it lingers far longer than THC or 11-hydroxy-THC. Because it accumulates in fatty tissue and releases slowly, THC-COOH is the standard target for urine drug screens, and it is the reason a person can test positive days or weeks after the effects wear off.

THC-COOH Glucuronide

This is the conjugated form that leaves the body. It is water soluble, which is why cannabis metabolites show up in urine and why hydration and kidney function can shift detection times.

CBD Metabolites

CBD follows a similar path but produces different compounds. The liver converts CBD into 7-hydroxy-CBD and then 7-COOH-CBD, with several other minor metabolites along the way. CBD metabolites are not considered intoxicating. 7-COOH-CBD is the main marker researchers look for in urine when they want to confirm CBD use rather than THC use.

Why Metabolites Matter for Drug Testing

Standard panels do not test for THC directly. They test for its breakdown products, which is why the detection window depends on metabolism as much as on how much you consumed. General ranges reported by health agencies look like this:

Urine: roughly 1 to 3 days after a single use, and up to 30 days or longer with heavy, daily use.
Blood: a few hours to a couple of days, since parent THC clears fast and THC-COOH clears a bit slower.
Saliva: about 24 to 72 hours.
Hair: up to 90 days, since metabolites become trapped in the hair shaft as it grows.

These are averages, not guarantees. Individual results vary widely.

What Affects How Long Metabolites Stay in the Body

Frequency and dose: daily, high-dose use builds up more stored THC-COOH than occasional use.
Route of use: oral products undergo first-pass liver metabolism, producing higher levels of 11-hydroxy-THC than smoking or vaping.
Body fat: THC-COOH is fat soluble, so people with more adipose tissue tend to release it over a longer period.
Liver enzymes and genetics: CYP2C9 and CYP3A4 activity differs from person to person, and some drug interactions slow those enzymes down.
Age, hydration, and kidney function: all influence how quickly conjugated metabolites are flushed out.

Edibles vs Smoking: Different Metabolite Ratios

Inhaled THC reaches the brain within minutes and only part of the dose passes through the liver. Edible THC is absorbed through the gut and delivered to the liver first, so a larger share converts to 11-hydroxy-THC before it circulates. That difference explains the delayed onset, the stronger intensity, and the longer duration many people notice with edibles.

Do Cannabis Metabolites Get You High?

Some do, some do not. 11-hydroxy-THC is psychoactive and potent. THC-COOH is inactive, which is why it can sit in the body long after any effects fade. CBD metabolites are not associated with intoxication. So a positive test result means exposure to cannabis, not current impairment.

Key Takeaways

Cannabis metabolites are breakdown products made in the liver, not compounds found in the plant.
THC becomes 11-hydroxy-THC and then THC-COOH; CBD becomes 7-OH-CBD and 7-COOH-CBD.
THC-COOH is inactive but stays in the body longest and is the usual target of drug screens.
Detection windows range from hours to months depending on dose, route, body composition, and individual metabolism.