Drug test

How Long Does Weed Stay In Your System


Cannabis, popularly known as weed, can typically be detected 1 to 30 days after the last intake of human fluids. How long does weed stay in your system is a popular question we’re out to answer today. The amount of time marijuana stays in a person’s system might vary, just like with other narcotics. The results of a drug test can be affected by a number of factors, including frequency of usage, the tetrahydrocannabinol (THC) content, metabolism, and hydration. However, in general, longer detection times are linked to larger doses and more frequent usage.

Like other substances, cannabis could be detected in your hair for several months, especially in those who use it daily or nearly daily.

Today, we’re not doing CBD vs THC debate but read on to find out more about marijuana retention through different organs of the human body.

How THC is Metabolized

THC is converted by the liver into several metabolites – drug tests detect these metabolites because, in the body, they stay longer than THC – (but the most notable are 11-hydroxy-THC and carboxy-THC) or is absorbed into a variety of human tissues and organs, including the brain, fat, and heart. The body excretes about 20% of cannabis through urine and about 65% is expelled through feces while it stores the remainder.

The THC that has been kept in bodily tissues over time is eventually transferred into the bloodstream and processed by the liver. THC can appear on a drug test days or even weeks after a person smokes marijuana because, among chronic users, THC accumulates in fatty tissues way faster than it can be excreted.

Factors That Influence How Long Marijuana Remains Detectable

The time that marijuana stays in your system depends on a variety of factors. Metabolic rate and Body mass index (BMI), for example, has less to do with the medicine itself and more to do with how people’s bodies metabolize and process it.

Other elements have to do with marijuana and how you use it. This covers the dosage, frequency, mode of administration, and potency of the cannabis that you take.

THC may linger in your system longer in marijuana that is strong and has a greater THC content. Additionally, ingested marijuana can stay in your system a little bit longer than marijuana that is smoked.

The time it takes for weed to leave your system tends to grow longer with higher doses and a higher frequency of use.

Types of Drug Tests

Testing for marijuana only finds traces of past marijuana use, not current addiction intoxication. After ingestion, marijuana can still be traced for days, weeks, or even months. This detection window’s length is influenced by the type of sample, marijuana dosage, and frequency of use. The various types of drug tests for marijuana include;


According to the Mayo Clinic Proceedings’ Clinical Interpretation of Urine Drug Tests, marijuana usage can be spotted in urine up to several weeks after the last time you used it. This is dependent on the degree of usage from person to person. In general, to answer the question of “How long does weed stay in urine?” the recommendations indicate that:

  •      For single use, it can be traced up to3 days after the last use
  •      For moderate users, it can be traced up to5-7 days after the last use
  •      For chronic users, weed can be spotted10-15 days after your last use
  •      While chronic heavy users, it can take as many as30 days after the last use.

According to MedlinePlus, the most typical test for finding marijuana is a urine test.


This particular test is common with drivers as they are frequently tested for drugs at traffic checkpoints with their saliva – it will pick up marijuana use from 24-72 hours after the last use.


Hair testing is an additional method for detecting marijuana in your body since THC enters your bloodstream and travels to your hair follicles. With a presence of up to 90 days after your last usage, a hair test could still reveal drug use.

Hair tests are typically less accurate than other cannabis drug testing methods. The presence of marijuana on your hair strands could cause a false positive if you’ve inhaled marijuana smoke or had direct physical contact with anyone who has used marijuana.


According to information provided by Drug and Alcohol Information and Support Ireland, cannabis is normally detectable in your blood for 1-2 days following usage – this may drastically rise in level of use. According to research by Therapeutic Drug Monitoring, the drug may remain detectable in some chronic users’ blood for up to 25 days after their last use.

Testing Sample Time of Detection
Urine Up to Three (3) days – can be as much as 6 weeks in heavy users
Saliva Up to 24-72 hours
Hair Up to Ninety (90) days
Blood Up to Seven (7) days

This table explains how long does marijuana stay in the urine, saliva, hair, and blood

Is it Legal to Demand A Drug Test in the USA?

Federal law doesn’t have a lot to say about drug testing, with the exception of those companies in sectors that are tightly regulated federally (like nuclear energy, transportation, and military contracts). Drug testing is nevertheless governed by the law in several states and even by some local authorities. The requirements frequently change depending on whether the company wishes to test an employee.

However, practically speaking, state laws permit companies to drug test applicants. But the employer is required to abide by the state’s regulations for giving notice and carrying out steps to stop discrimination and the use of unreliable samples. For instance, some states only permit applicant testing if:

  •      The candidate is aware that these tests will be conducted as part of the hiring process (for example, because it was indicated on the job application or because it was mentioned in the employer’s internet job advertisement).
  •      The candidate has already received a job offer from the employer, subject to passing a drug test.
  •      The testing is comparable for all candidates for the same position.
  •      A laboratory that has received state certification conducts the testing.

Nowadays, the majority of businesses that plan to test job applicants for drugs include a consent form on the job application. You won’t have much of a choice but to submit to the test if you are requested to submit to a drug test while looking for a job.

Is It Possible To Force-metabolize?

You can’t really do anything to hasten the time it takes for THC or its metabolites to leave your body.

Once THC has been ingested, it takes some time for your body to break it down. Exercise, a good diet, and drinking enough water may help, but not significantly.

On the internet, you can find kits and cures for cannabisdetox. Many opine that you drink a lot of water to thin out your pee, then go on to use herbal supplements like creatine or vitamin B12 to cover up the dilution.

Is It Possible To Receive A False Positive Test for THC?

False positive tests for THC are quite rare but have been linked to a select group of chemicals, with hemp products being the most prevalent and evident. Delta-8 and Delta-10 THC, two hemp-derived modified cannabinoids, will always trip that wire, although hemp-derived CBD products and foods may occasionally result in consumers failing tests. Have that at the back of your mind when you have a hemp-seed muffin for breakfast.

Be mindful when washing your hands with regular baby soaps because, according to a 2012 study, they might cause positive THC results when your urine samples are checked. Anti-inflammatory drugs like fenoprofen, naproxen, and ibuprofen, as well as the proton pump inhibitors omeprazole, esomeprazole, and pantoprazole, which are used to treat acid reflux, have in extremely rare instances—we’re talking less than 1 percent—caused false positives for THC. HIV medicine efavirenz has also falsely highlighted THC tests. So, be mindful, that there are many things to consider when thinking abouthow to pass the drug test for THC.


Marijuana can be in your system for many days or months and the detection window can be influenced by your dosage, frequency of use, your medium of intake, etc.

Frequently Asked Questions

How Long Does It Take Weed To Leave Your System?

THC metabolites are often detected in the bloodstream for 1 to 30 days following last use.

Even after abstaining for a while, heavy cannabis users may still have high THC levels.

How Long Do Edibles Last?

When compared to smoking or vaping, edibles take much longer to start working, but they also typically last much longer. The biggest effects start to appear about three hours after ingestion, and the usual dose from an edible can persist for six or more hours.

Can You Test Positive From Edibles?

Yes, a drug test will detect THC from edibles. THC enters your system regardless of whether you consume it or smoke it.

What is THC Detox?

A detox involves ridding the body of something—in this case, THC or marijuana (or its products like oil)—and taking some time away from it. The body can remove THC from its system by refraining from cannabis.

In the article on Mercurynews “THC Detox Guide and Best Ways to Get Weed Out of System” you can read the detailed information about how to get weed out of your system fast. We strongly recommend that you read this article, because this is full guide on the topic.

Depending on how much cannabis you use and whether or not you use it for medical reasons, weed detox procedures may be simple for some people and challenging for others. But the process starts easily, you can just google “where to find Mega Clean Detox Drink me”? or “THC detox”

How Long Does Marinol Stay in Your System?

Your body absorbs the synthetic THC in Marinol in the same way it does the THC found naturally in marijuana. It is also processed, excreted, and stored in the same ways. Marinol is dissolved and excreted in the urine for a period of two to five weeks. It will show up on urine drug tests throughout this time.



Annual lecture | Darlith Blynyddol









Delivered by Professor Samantha Thomas
Deakin University, Melbourne, Australia

Samantha is a public health sociologist and qualitative expert at the Centre for Population Health Research. She specialises in understanding the impact of industry tactics on health behaviours. Samantha has worked in a number of areas of health, including mental health, and obesity, but is most well known for her research into the commercial determinants of gambling harm, and public health advocacy responses to these.






Social networks

Research evidence shows that recovery support groups provide effective sobriety support networks. Such social networks have a very beneficial effect on maintaining and supporting abstinence. In order to maintain your ongoing recovery, is it important to note the principle of establishing social support networks. 


“Being a part of Living Room Cardiff has given me peace of mind, a sense of belonging, overwhelming love and contentment, the courage to allow myself to make mistakes and not beat myself up over it. To love myself, and to forgive. I have met wonderful and inspiring people. I will never forget them.” Siân.

Siân joined the “All recovery group” six months ago and has established a network of PIRs who have her wellbeing at heart and support her ongoing recovery. Today she has more real friends than ever before – friends who are authentic, real and true to themselves – and to Siân.



“I reckon I’ve developed compassion towards them (family members), I now see things in a different light. I’ve been able to let go of entrenched ideas and move forward with hope.” Lynne.


Lynne realised that there’s a little good and a little bad in each and every one of us. By finding the little good in her father she was able to find the key to forgiveness – not that her father could be let off the hook (he’d physically abused her); but that Lynne could be free of the resentment that still allowed her long-dead father to control her life.



“Can’t believe what I have packed into just 2 days. I have done some random, surreal stuff which has pushed me out of my comfort zone. But it has been worth it.


“I’m willing to go to any lengths. I have laughed and cried – felt pain, but welcomed healing. Will never forget the story of the Nepalese Yeti’s a….e….! Can’t remember laughing so much!” Una.

Una is describing her reaction to our Love and Forgiveness Retreat, when she spent quality time with like minded people – those in recovery, or family members and friends of those in recovery – and getting away from the often painful and bewildering, hustle and bustle of life. We believe there seems little difference in the pain that we all can suffer. In having these weekend retreats we believe that change is possible and life can be worth living – as Una testifies.



“Stress often results when I don’t give myself a choice. That’s when I end up at the mercy of a situation or condition. When I was a student the pressure of work really got to me and my stomach was all tied up in knots. My counsellor suggested I give myself a choice:


I could walk away from the college course, call it a day, and go and do something else if I wanted to. Alternatively, I could, stay on, knowing what the work involved, and try to cope with the stress as best I could. All of a sudden, I’d taken charge of my life. I was no longer at the mercy of my situation. I was about to make a choice. My choice was to stay on at college and to do my best to cope with the workload. Miraculously the stress eased, and I found I could manage it better from then on.” Robert.

Robert also learnt to deal with fear by making a list of the ones that were bugging him. Then he made a note of how the fear affected him – his emotional and financial security, his self-esteem, his relationship with others, his personal and social ambitions, etc. Then he looked at what he might have done to cause the fear in the first place; had he been selfish or self-seeking, had he been dishonest, irrational, or flippant, and so on. Finally, he tried to think of ways to ensure the same thing wouldn’t happen again – to think and behave differently. Robert carried out this exercise collaboratively with his Recovery Coach.



“Relapse started for me when Jane my sister gave me a funny “Oh God, not again!’ look. That was two weeks before I actually picked up a drink. I learnt that relapse often occurs after an emotional disturbance of some sort or other. The first signs are when I feel Hungry, Angry, Lonely or Tired (HELP).” Simon.


Simon learnt some relapse prevention strategies that helped him cope with emotional disturbances, such as phoning his sponsor, going to meetings, sharing his hurt feelings with another People in Recovery, etc. In a role modelling workshop, Simon even rehearsed what he would say to his sister if a similar episode were to happen again.



The transition to recovery from addiction is a complex process, where priorities and needs significantly change throughout. One should be aware that abstinence is just the first of many steps towards full recovery. But it’s a good base from which to effect change in other areas of one’s life.


From our work with a variety of clients, we know that individuals in recovery still tend to encounter difficulties in many areas of their lives long after having achieved abstinence. Mainly because the negative impact that active addiction has on many life domains remains and requires long-term commitment to remedy its injurious effects on relationships, healthy lifestyles, acceptable living conditions, etc. This is where the hard work begins! Achieving a healthy, productive life becomes the main aim. Abstinence is only one side of the recovery coin, what awaits us on the other side is a long journey towards improved health, wellness and quality of life.



In your recovery, we believe in the collaborative process, where you direct your own recovery journey and we come alongside you to help you achieve your goals. With regards to your recovery you can be active in many ways: 


  • It is always helpful to be well-informed and educated about your condition as this enables you to make informed decisions.

  • You can begin by finding out as much information as possible about the physical, as well as psychological impact of addiction not only on your life, but also the lives of others and close family members

  • Active approach also means asking others for help when you need it If you attend mutual aid meetings and support groups, it is suggested that you attend regularly. Recovery needs consistent and ongoing support. Stick-to-itiveness is the secret.

  • Find out about local organisations that can offer you support if you’re ever in a crisis.

  • Try to network and socialise with people that understand and positively support your recovery. Don’t go to wet places if you can avoid it and don’t mix with the old crowd. Remember: if you visit the hairdresser often enough you’ll end up having a hair cut!


Positive thinking

  • Get involved in activities that you enjoy and find fulfilling

  • Try something new, or get involved in the creative arts and express yourself


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