Cannabis metabolites are the chemical breakdown products formed after your body processes cannabinoids such as THC and CBD. They are created mainly in the liver, and the best-known example is THC-COOH, a non-intoxicating THC metabolite that many drug tests screen for. Metabolites differ from the original cannabinoids because they have been chemically changed so the body can eliminate them.
cannabis metabolites in hair follicle test
What Are Cannabis Metabolites?
Cannabis metabolites are compounds produced when enzymes modify cannabinoids after they enter the bloodstream. Once THC or CBD reaches the liver, it undergoes a series of chemical reactions. The parent compound may be active, but its metabolites can be active, inactive, or even more potent. For example, THC is psychoactive, while its metabolite THC-COOH is not. Another THC metabolite, 11-OH-THC, is psychoactive and can contribute to effects.
THC-COOH Metabolite Drug Test Cutoff: 50 ng/mL Screen, 15 ng/mL Confirm
Metabolites are important because they are what most laboratories look for when testing for cannabis use. The body clears cannabinoids and their metabolites through urine, bile, sweat, and other routes.
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How the Body Metabolizes Cannabinoids
Cannabis metabolism happens in two main phases. The liver does most of the work, though other tissues can play a smaller role.
- Phase I metabolism: Cytochrome P450 (CYP450) enzymes oxidize cannabinoids, creating hydroxylated metabolites. THC is converted to 11-OH-THC and then to THC-COOH. CBD is converted to several hydroxylated metabolites, including 7-OH-CBD.
- Phase II metabolism: The body attaches molecules such as glucuronic acid to the phase I metabolites. This makes them more water-soluble so they can be excreted in urine or bile.
The main CYP enzymes involved in THC metabolism are CYP2C9, CYP3A4, and CYP2C19. CBD can inhibit some of these enzymes, which is one reason CBD may interact with certain medications.
Key THC Metabolites
11-OH-THC
11-OH-THC is an active THC metabolite. It can cross the blood-brain barrier and bind to cannabinoid receptors. Some research suggests it is more potent than THC at CB1 receptors. After eating cannabis, the liver converts a larger share of THC into 11-OH-THC before it reaches the bloodstream, which may help explain why edible effects can feel stronger and last longer.
THC-COOH
THC-COOH is the main inactive THC metabolite. It is not psychoactive, but it stays in the body longer than THC itself. Urine drug tests usually detect THC-COOH because it is a stable marker of recent or past cannabis use. THC-COOH forms when 11-OH-THC is further oxidized in the liver.
Other THC metabolites
Scientists have identified dozens of minor THC metabolites, including various hydroxylated and glucuronide forms. These compounds appear in blood, urine, and other biological samples, but they are not typically the main target of standard drug tests.
CBD Metabolites
CBD is metabolized mainly by CYP3A4 and CYP2C19, with other enzymes playing smaller roles. Its metabolites include 7-OH-CBD and several other hydroxylated compounds. These metabolites are not known to produce THC-like psychoactive effects. Standard cannabis drug tests for THC do not detect CBD or its metabolites.
How Long Do Cannabis Metabolites Stay in Your System?
Detection times vary widely from person to person. There is no single formula that predicts exactly when cannabis metabolites will clear your body. General patterns include:
- Urine: THC-COOH can be detected for several days after occasional use and sometimes for weeks after frequent, long-term use.
- Blood: THC and 11-OH-THC are detectable for only a few hours after smoking or vaping. THC-COOH may be detectable slightly longer.
- Saliva: THC and its metabolites are usually detectable for hours to a couple of days after use.
- Hair: Hair tests can detect cannabis metabolites for a longer window, though they are less common and can be affected by external contamination.
Factors that influence detection time include how often you use cannabis, the dose and potency, your body fat percentage, your metabolism, your liver health, and the sensitivity of the test.
What Affects Cannabis Metabolite Levels?
- Frequency of use: Daily or near-daily use can lead to higher and longer-lasting metabolite levels than one-time use.
- Route of administration: Inhalation delivers THC to the bloodstream quickly. Edibles go through the liver first, producing more 11-OH-THC.
- Body composition: THC is fat-soluble. It can be stored in fat tissue and released slowly over time.
- Genetics and liver function: Variations in CYP450 enzymes can change how quickly a person metabolizes cannabinoids.
- Medications and supplements: Some drugs can inhibit or induce the same liver enzymes that process cannabinoids.
- Hydration: Drinking water may dilute urine, but it does not reliably change how long THC-COOH remains detectable.
Why Cannabis Metabolites Matter
Cannabis metabolites matter for drug testing, clinical care, and cannabis research. THC-COOH is the standard urine marker for cannabis exposure. 11-OH-THC helps explain the intensity of edible effects. CBD metabolites are an active area of study because they may influence how CBD interacts with the liver and other medications.
If you use cannabis legally under your state's laws, understanding metabolites can help you make informed choices about timing, product selection, and any testing requirements. It does not replace medical advice or legal guidance.
Common Questions About Cannabis Metabolites
Are cannabis metabolites psychoactive?
Some are. 11-OH-THC is psychoactive and can contribute to the high from cannabis, especially edibles. THC-COOH is not psychoactive.
Can CBD turn into THC metabolites?
No. CBD does not convert into THC or THC-COOH in the body under normal conditions. However, some CBD products may contain trace amounts of THC, which can produce THC metabolites.
Do cannabis metabolites cause the high?
THC itself is the main psychoactive compound in cannabis. Active metabolites like 11-OH-THC can add to the effects, but the primary high comes from THC binding to CB1 receptors.