“How long does weed stay in your system?” is a common question as more U.S. states legalize the use of marijuana for medical and recreational purposes. Knowing how long marijuana use affects your body is just as important as learning how and when the body clears it.

​​This guide answers these questions and highlights detection times for weed using different drug tests. You will also learn how to get compassionate and effective marijuana addiction treatment if you have been struggling with substance abuse, including marijuana and other drugs.

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How Long Does Weed Stay in Your System?

The length of time weed can stay in your system typically varies widely depending on many factors [1]. These factors can include:

• Method of use
• Frequency of use
• Body type
• Hydration and activity

Continue reading to learn more about each of these factors.  

Method of use

When you smoke or vape marijuana, delta-9-tetrahydrocannabinol (THC) quickly enters your bloodstream through the lungs [2]. Here is the timeline for detection:

• If you only smoked once: If you only smoked once, THC can stay in your urine for about 3 days.
• If you smoke a few times a week: If you smoke a few times a week, THC can stay in your system for 5 to 7 days.
• If you smoke daily: If you smoke marijuana daily, THC can be detected for 10 to 15 days.
• If you smoke multiple times a day: If you smoke many times each day, THC might stay in your system for 30 days or more.

Eating a marijuana edible means THC takes longer to enter your bloodstream because it has to go through your digestive system [3]. This can make the effects last longer, and THC might stay in your system a bit longer than when smoking.

• For a single use: 3 to 7 days.
• Regular use: 10 to 30 days.

Frequency of use

“How long does marijuana stay in your system?” is strongly influenced by how often you use it. If you only use marijuana once, it leaves your body faster. But if you use it regularly, THC concentrations build up in your fat cells and take longer to clear out [4].

• Single use: 3 to 7 days

• Regular use (a few times a week): 1 to 2 weeks

• Daily use: 2 to 4 weeks

• Heavy use (multiple times a day): Over a month

Different body types

Your body type also affects how long THC stays in your system. Since THC is stored in fat cells, individuals with a higher body mass index (BMI) or more fatty tissue can store THC longer, so it takes more time to leave their system [5]. People with faster metabolisms can process and remove THC more quickly.

Hydration and activity

Drinking lots of water can help your body get rid of THC faster, but it won’t make a huge difference. Staying active and exercising can help too, because when you burn fat, you release stored THC into your bloodstream [1], which can then be processed and removed.

How Long Does It Take for Marijuana to Leave Your System After Quitting?

When you stop using marijuana, your body starts to get rid of THC and its metabolites. This process can take a different amount of time for each person. Generally, it can take from a few days to over a month for marijuana to leave your system completely. The exact time depends on how often you use marijuana, your body type, and your overall health.

If I Smoke Once a Week, How Long Until I’m Clean?

If you smoke marijuana once a week, THC can stay in your system for about 5 to 7 days after your last use. This is because your body needs time to process and remove the THC from your bloodstream and fat cells. Drinking plenty of water and staying active might help speed up the process a bit, but time is the most important factor.

If I Smoke Everyday, How Long till I’m Clean?

If you smoke marijuana every day, it can take much longer for your body to get rid of all the THC. With daily use, THC remains in the system for 2 to 4 weeks or even longer after quitting. This is because THC builds up in your fat cells and takes time to fully clear out. Regular exercise and staying hydrated can help, but patience is key. 

How Long Does Weed Stay In Your System After a Couple of Puffs?

If you only take a couple of puffs of marijuana, THC can still stay in your system for a few days. Usually, urine tests detect its presence for about 1 to 3 days, making marijuana detection possible even after using a small amount.

Drug Testing Methods & Weed

Different drug screens can detect marijuana in your body for different periods of time. The most common tests are hair, blood, saliva and urine tests. Each one has its own way of finding THC and its metabolites in your system.

How Long Does Weed Stay in Your Hair Follicles?

Weed can stay in your hair follicles for a long time. A hair test can detect THC for up to three months after you last used marijuana. This is because THC travels from your bloodstream to your hair and stays there as your hair grows [6].

How Long Does Weed Stay in Your Blood?

Weed doesn’t stay in your blood for very long [7]. After smoking or eating marijuana, marijuana remains in the bloodstream for about 1 to 2 days. With heavy use, it might be detectable for up to a month. Blood tests are effective at detecting recent use.

How Long Does Weed Stay in Your Urine?

How long weed stays in your urine depends on both the frequency and the amount of use [8]. For a single use, drug tests can detect marijuana for about 3 days, which may result in a positive urine test . With light or moderate use (if you use it a few times a week), blood tests can stay detectable for 5 to 7 days. Daily use might show positive drug tests for 10 to 15 days, and THC can remain in the urine for over 30 days with heavy use.

Marijuana Effects Onset & Duration

Marijuana’s effects can start quickly or take some time to kick in, depending on how you use it. The duration of these effects also varies.

When Do Effects Start?

When you vape or smoke marijuana, you can start to feel its effects within just a few minutes. This is because THC quickly enters your lungs, then your bloodstream, and finally your brain.

If you eat marijuana edibles like brownies or cookies, it takes longer to feel the effects. You might not feel anything for 30 minutes to 2 hours. This is because your body needs time to digest the food and absorb the THC.

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When Do Effects End?

The effects of vaping or smoking marijuana usually last for 1 to 3 hours. After that, you might still feel some lingering effects, but they won’t be as strong.

The effects of eating marijuana can last much longer. You might feel high for 4 to 8 hours or even longer, depending on how much you ate and how your body processes THC.

Even after the noticeable effects wear off, THC and its metabolites may stay in your system [2]. This is why drug tests can detect the metabolites days, weeks, or even months after the last use, depending on various factors.

THC In Your System | FAQs

How can I pass a drug test if I use marijuana?

To pass a drug test, you need to stop consuming marijuana well beforehand. Drinking lots of water and staying active might help, but there’s no guaranteed way to pass if there was recent marijuana use.

How do I detox from weed?

Detoxing from weed addiction means letting your body get rid of THC naturally. Drink plenty of water, eat healthy foods, and exercise to help your body clear out the THC faster.

Is there a way to clear my body of weed fast?

There isn’t a quick way to clear weed from your body. Time is the best way to let THC and its metabolites leave your system. Some people try detox kits, but these are not always effective and can be risky.

How is THC metabolized?

THC (delta-9-tetrahydrocannabinol) is the psychoactive component in marijuana that makes you feel high [9]. When you smoke or eat marijuana, THC reaches your bloodstream and travels to different parts of your body, including your brain. The liver then breaks this down into smaller substances called THC metabolites. These THC metabolites stay in your body for a while before they are eventually removed through your urine and feces.

Is THC still in your system after you no longer feel its effects?

How long does THC stay in your system, then? The compound can stay in your system even after you stop feeling high. The effects of marijuana may wear off in a few hours, but due to ongoing drug use, THC and its metabolites can remain in your body for days or even weeks. This is why you can test positive for THC long after the effects are gone.

If you hit a cart, how long does it stay in your system?

Using a vape cart with THC can leave traces in your system for several days to weeks. If you use it once, it might stay in your urine for about 3 to 7 days. If you use it regularly, especially if you have higher body fat percentages it could be detectable for 2 to 4 weeks or longer. Vape carts can have high THC levels, which means it takes longer to clear out.

How long does Delta-8 stay in your system?

Delta 8 THC, a slightly different and milder form of THC, can stay in your system for a similar amount of time as regular THC [10]. If you use delta 8 once, it might be detectable for about a week. With regular use, it could stay in your system for several weeks. Just like with regular THC, factors like frequency of use, body type, and mental health affect how long it stays in your body.

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We have inclusive luxury rehabs in Long Beach and Newport Beach, where you can begin your recovery with medical detox. This helps you to stop marijuana use safely with 24/7 supervision and access to medications.

All our inpatient programs for addiction deliver personalized treatments that include:

• Talk therapies
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• Medication-assisted treatment
• Family therapy
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• Group therapy
• Aftercare

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Sources

[1] https://www.ncbi.nlm.nih.gov/books/NBK538131/#

[2] https://pmc.ncbi.nlm.nih.gov/articles/PMC3570572/

[3] https://www.ccsa.ca/sites/default/files/2019-06/CCSA-7-Things-About-Edible-Cannabis-2019-en.pdf

[4] https://pmc.ncbi.nlm.nih.gov/articles/PMC8803256/#B33

[5] https://pmc.ncbi.nlm.nih.gov/articles/PMC2782342/

[6] https://pmc.ncbi.nlm.nih.gov/articles/PMC5396143/

[7] https://pmc.ncbi.nlm.nih.gov/articles/PMC4920965/

[8] https://www.mayoclinicproceedings.org/article/S0025-6196(16)30825-4/fulltext

[9] https://www.ncbi.nlm.nih.gov/books/NBK563174/

[10] https://pmc.ncbi.nlm.nih.gov/articles/PMC10976172/