Quick summary: THC’s effects wear off within hours, but its inactive metabolite, THC-COOH, can be detected for about 3 days after a single use, 5–10 days with regular use, and 30 days or more with daily use. How often you consume, your body fat, and the test type all matter. Hair tests can detect repeated use for up to 90 days.
At Verdes Cannabis, we get lots of questions about cannabis, THC, and the body. This article breaks down the half-life of THC, what THC-COOH is, and how long cannabis can be detected in your system
Last updated: October 2026
Key Takeaways:
- An inactive metabolite of THC can be detectable for 30 days or more in daily consumers.
- THC-COOH doesn’t cause a high or impairment, but it’s what most drug tests look for.
- THC-COOH is fat-soluble and is stored in your body’s fat cells.
- How often you consume, what you consume, and your body composition affect how long THC-COOH stays in your system.
- There’s no proven way to flush THC-COOH faster; stopping consumption and giving your body time is the only reliable approach.
What Is THC-COOH?
THC-COOH is an inactive breakdown product of THC. After you consume cannabis, your body processes THC into THC-COOH, which does not cause a high or impairment. Because it is fat-soluble, THC-COOH can remain in the body for days or even weeks after the effects of THC have worn off.
It’s one of the main metabolites that urine drug tests look for, which is why someone can test positive for cannabis long after they are no longer impaired.
Why Does THC-COOH Stay In Your System?
Any substance you consume has a half-life, which is the time it takes to reduce by 50% in your bloodstream. The half-life of THC-COOH in the bloodstream is 1 to 3 days for occasional consumers; for frequent consumers, it can stretch to a week or more. But it’s not limited to your circulatory system.
Think of a B vitamin. Many people who take B vitamins notice a change in the color of their urine a few hours after taking them. This is because B vitamins are water-soluble and processed out through your urinary system.
THC-COOH is a lipophilic molecule, which means that it binds to fat molecules. It takes longer for fat-soluble THC-COOH to be processed out of your system because it dissolves in fats, oils, and lipids, but it does not dissolve in water.
The more THC you consume, the more THC-COOH gets stored in your fat cells, and the longer it takes for your body to process it.
What Affects How Long THC-COOH Stays in Your System?
THC-COOH can stay in your system for anywhere from 3 to upwards of 30 days. This is based on several factors, including:
- How frequently you consume cannabis
- Your body composition and metabolic rate
- How potent the product is
- How cannabis use is being tested (urine, blood, hair, saliva)
How Often Do You Consume THC?
The more often you consume THC, the longer its metabolites, particularly THC-COOH, stay in your body. A single session with a pre-roll or consumption of a small edible can leave THC-COOH that’s detectable for up to 72 hours.
The more often you consume, the more THC-COOH builds up in your fat cells, and the longer it takes to process out. If you consume cannabis a few times a week, THC-COOH will usually take between 5 and 10 days to leave your body.
If you’re a daily consumer, it can take 30 days of abstinence or more for your body to process all the THC-COOH out.
What Is Your Body Composition?
Because THC-COOH is fat-soluble, body composition has a lot to do with how fast it is processed through your system. Your gender, body mass index (BMI), and genes also affect how quickly you process THC and its metabolites.
If you’re mostly sedentary or have a larger body, THC-COOH can take longer to pass through your system. People with lower body fat and faster metabolisms may clear THC-COOH sooner over time.
Also, exercising right before a test can temporarily raise THC and THC-COOH levels in the blood.
How Potent Is the Cannabis Product?
Like alcohol, the product’s strength matters; a beer is less potent than a shot of vodka. A highly potent product that contains a lot of THC, like vapes or concentrates, can leave more THC-COOH behind, which takes longer to process through your body.
A product with more CBD, CBG, or other minor cannabinoids that lower the amount of THC may not take as long.
How Is Cannabis Use Being Tested?
Different tests look for different compounds. Urine and hair tests look for THC-COOH, while blood and saliva tests mainly detect THC itself, which reflects more recent use. A urine test is the most common in drug testing and can detect even small amounts of THC-COOH. The strictest drug test is the hair follicle test, which can detect signs of cannabis use for up to 90 days after consumption. Hair testing is considered unreliable for detecting one-time use and mainly picks up repeated use.
Here’s how long cannabis use is typically detectable by test type and frequency of use:
| Test type | Occasional consumer | Regular use | Heavy daily use |
|---|---|---|---|
| Urine | ~3 days | 5–10 days | 30+ days |
| Blood | Hours | 1–2 days | Up to a week |
| Saliva | 24–72 hours | 24–72 hours | Up to several days |
| Hair | Unreliable | Up to 90 days | Up to 90 days |
Can You Flush THC-COOH Out of Your Body?
Your body naturally processes THC-COOH on its own timeline. There is no scientific evidence that you can speed up the rate at which THC-COOH is processed through your body. Some people try THC detox kits, but these are unproven and can be risky.
FAQs About THC In Your System
- How long does THC stay in your urine?
Technically, it’s THC-COOH, not THC, that shows up in urine. About 3 days after a single use, 5–10 days with regular use, and 30 days or more with heavy daily use. Urine tests detect THC-COOH, an inactive metabolite stored in fat and released slowly. - Why is THC still in my urine after 30 days?
What’s in your urine isn’t THC but THC-COOH, its inactive metabolite. With daily use, THC-COOH builds up in fat cells faster than your body clears it. After you stop consuming, it keeps releasing into your urine for weeks, especially in heavy consumers. - Can you flush THC out of your system faster?
No. Detox kits aren’t backed by research, and hydration won’t shorten the detection window. Intense exercise right before a test can even backfire by releasing stored THC and THC-COOH into your blood. - Do edibles stay in your system longer than smoking?
Not by much. Tests measure the same metabolite, THC-COOH, either way, so dose and frequency matter more than method. Strong edibles may stay detectable longer because they contain more THC, which means more THC-COOH. - Can CBD products make you fail a drug test?
Yes, some can. Full-spectrum CBD can legally contain up to 0.3% THC, which your body converts to THC-COOH, and that can build up with regular use. If you’re tested, choose THC-free isolate or broad-spectrum products. - Can secondhand smoke make you test positive for THC?
It’s very unlikely. Standard test cutoffs screen out passive exposure. Only extreme exposure, like hours in a small, unventilated room with heavy smoking, has caused positive results in studies. - Does delta-8 THC show up on a drug test?
Yes. Standard tests can’t tell delta-8 from delta-9 THC metabolites, so treat delta-8 products like regular cannabis. - Does feeling sober mean THC is out of your system?
No. The effects of THC last 1–3 hours when smoked and 4–8 hours or longer with edibles, but THC-COOH, its inactive metabolite, stays detectable for days to weeks. That’s why you can test positive long after you’re no longer impaired.
Find Cannabis For Every Kind of Journey at Verdes
As New Mexico’s most awarded dispensary, Verdes knows that supportive cannabis consumption looks different for everyone. That’s why we offer a wide range of cannabis products, including CBD and other minor cannabinoids.
Looking for lower-THC options? Browse our CBD and balanced-ratio products at Verdes Cannabis today.
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DISCLAIMER: The contents of this blog are intended for informational purposes only. Always seek the advice of a physician or other qualified healthcare provider with any questions you may have regarding a medical condition.