How Long Does THC Stay in the Body?

THC is just like any other compound that goes through your body’s metabolism processes. But exactly how long does marijuana stay in your system? Like most drugs, the duration that weed remains in your body depends on various factors. These factors include: 


  • Use frequency 
  • Level of THC in the weed 
  • Hydration levels
  • Bodyweight

Detection times also vary depending on the drug test used. Metabolites will remain longer in the hair than most drug testing samples. 

Here are the four types of drug tests and their average detection times:


  • Hair (90 days)
  • Urine (3 – 7 days)
  • Saliva (1 – 29 days)
  • Blood (3 hours – 2 days)


How the Body Metabolizes THC

Once Tetrahydrocannabinol (THC) enters the body through the lungs (in case of smoking), It’s absorbed into the bloodstream, scattering it to tissues throughout the body. Once the compound reaches tissues in the brain, it creates that “high” effect familiar to cannabis use.

Edibles stay a bit longer in the liver but eventually go through the same process. 

THC metabolism has two phases to clean weed out:


  • Phase 1: THC Hydroxylation & Oxidation


Specific enzymes in the body hydroxylate portions of the cannabinoid, creating a metabolite called 11-OH-THC. This compound is responsible for the psychoactive effects of cannabis. 11-OH-THC is then oxidized by the same enzymes, turning it into THC-COOH, an inactive metabolite that can no longer bind to cannabinoid receptors. THC-COOH is the metabolites that show up on a drug test.


  • Phase 2: THC Leaves the Body


In this phase, THC-COOH converts into a THC-COOH-glucuronide molecule, which the body excretes through urination and defecation. 


Types of Drug Testing Methods


There are four drug testing methods, and each one differs in process, required samples, and detection windows. If you’re wondering, “how long does it take weed to leave system,” there’s no definite answer as it differs for each individual. Factors like body weight, dosage, and frequency determine how long does THC take to get out of your system. You may refer to this handy calculator to get an estimate.


Let’s go over each drug testing method.


1. Urine Drug Test


Urine tests, also known as urinalysis, include visual and chemical examinations of a urine sample to look for drug compounds that stay in pee long enough to be detected. 


How Long Will THC Stay in Urine?


THC stay in your system for a urine test between 3 and 30 days. Several factors affect the length of time marijuana remains detectable, including use frequency, body mass, hydration levels, and urine acidity. 


As with most other drug test samples, the most significant factor that determines duration is the frequency of use:


Marijuana Use Frequency Detection Window
One-time use 3 days
Moderate use (four times a week) 5 – 7 days
Daily use 10 – 15 days
Heavy use More than 7 days



Are There Ways to Pass a Urine Test?


THC in the urine will naturally clear away over time, but you can hasten the detoxification process. The most efficient way is by taking detox supplements, like Toxin Rid’s dietary supplement program. Toxin Rid can get THC out of your system fast. It works by accelerating the body’s natural detox process, removing weed detectable in urine in time for urinalysis.


Supplements can be effective, but they need time to work. Some people resort to “backup plans” like using synthetic urine. One product that’s often used is TestClear’s artificial powdered urine kit. This product has a formulation that simulates human urine, which can test negative on a standard urinalysis. 


2. Blood Drug Test


Blood tests are another method for exposing marijuana use. In this method, testers analyze blood samples in a lab for traces of THC and other drug metabolites. As with urine, weed stay in your blood system long enough for detection.


How Long Will THC Remain in the Blood?


Marijuana traces remain in the blood for 3 – 4 hours for an infrequent user. Chronic and heavy use can increase this duration for up two days. Of course, other factors like the amount of THC in the weed and the person’s natural way of processing THC can impact how long pot stay in blood


3. Hair Follicle Drug Test


Hair follicle drug tests use hair follicle samples to root out drug use. Hair follicles have blood vessels where THC can pass through, making them detectable during a lab examination. 


How Long Does Weed Stay in Your Hair Follicles?


Hair drug tests have the most extended detection window among the other commonly used methods. Testers can determine drug use from hair follicles for up to 90 days. The more frequently you are at using marijuana, the more accurate it gets.


Can You Cheat a Hair Drug Test?


One of the most effective ways to detox hair follicles in time for a test is using a technique known as the Majuco Method. It involves using several products and ingredients to reduce the THC levels in the hair enough to test for negative. 

One of the most vital components of the Majuco is the Old Style Aloe Toxin Rid shampoo. Without this product, this technique just wouldn’t be as effective as it’s supposed to be. Toxin Rid can detox fast, and you can even use it as a standalone detox product without bothering with the entire method.


4. Saliva Drug Test


Saliva test, also known as a mouth swab drug test, uses saliva samples to identify the presence of marijuana and other drug metabolites. It typically involves using a sponged swab stick to swab the inside of the cheek or under the tongue.


How Long Does THC Stay in Saliva Glands?


A 2014 study reveals that use frequency plays a factor in weed detection times in the salivary glands:


Marijuana Use Frequency Detection Window
Occasional use 1 – 3 days
Chronic use 1 -29 days


Are There Ways to Pass a Saliva Test?

You can temporarily mask detectable drug toxins in your mouth using Toxin Rid Rescue Wash Mouthwash. This product is used just moments before the test and gives a 4-hour window of clean saliva. THC becomes undetectable during that 4-hour window.




  •  What Makes One a “Frequent” Cannabis User?


You’re considered a frequent or heavy user if you smoke weed at least once every day. Moderate use means using cannabis every other day or four times per week.


  • Can You Force Metabolize?


The metabolism rate varies from person to person. You can do a lot of things to boost your body’s natural metabolism, like exercise and frequent hydration.


  • Is It possible to Receive a False Positive Test for THC?


Yes, receiving a false positive for a THC drug test is possible. Certain hemp-based foods and secondhand marijuana smoke inhalation can trigger a false positive.

Still have questions? Read more here.