How Long Does Weed Stay In Your Body?
Kushmapper Learning Center
While the use of marijuana is now legal, many people might be concerned with how long it lasts in your body. As far as the immediate psychoactive effects go, THC can last for several hours; however, you can test positive for cannabis in your system for much longer than that. How long it stays detectable depends on many factors, and even the testing method itself.
Table of Contents
Learn About How Long Weed Stays In Your System
How Do You Test For Weed?
Like most other substances, weed is detectable through tests on blood, hair, saliva, and urine; these all have varying degrees of success, and the longer and heavier the usage, the more effective these tests can be. Whatever it is, the detection of cannabis in the system comes from how the body metabolizes THC. After it enters the bloodstream, the liver breaks it down into more than 80 parts called metabolites. These metabolites are temporarily stored in fatty tissues and organs like the kidneys, through which it can reenter the bloodstream.
Cannabis metabolites are fat-soluble, which means they bind to the fat molecules in your body. This is why it can take some time for cannabis to leave the body, remaining detectable in one’s system well after the weed’s effects have worn off.
How Long Does Weed Stay In Your System?
The window of detection depends on many different factors. The most influential way is how you take cannabis: the amount you ingest, how often, etc. Higher quantities and more frequent usage mean the metabolites can be detected in your body for a longer time after your last time. For example, certain tests can detect marijuana in daily users of cannabis for several months after their last use; one report has the detection time at more than 90 days.
A more potent weed that is higher in THC can stay in your system longer. Cannabis that you ingest through an edible may remain in your system longer than cannabis that you smoke.
Some of these factors don’t depend on the drug or how often it’s used; age, body mass index (BMI), and gender can all determine how a body processes and metabolizes THC.
How Long Are These Tests Effective?
Each test has a different length of efficacy:
- Blood: Weed can be detected in the blood almost instantly after usage, and it is usually detectable for 1 to 2 days.
- Hair: After ingesting, weed can reach the hair follicles through blood vessels. Trace amounts may remain in the hair for up to 90 days.
- Saliva: Weed is detectable in saliva for one to three days in occasional users and up to a month in chronic users. It is detectable almost instantly.
- Urine: Weed is detectable in urine up to three days in occasional users, five to seven days in moderate users, 10 to 15 days in chronic daily users, and more than 30 days in heavy users who ingest more than once a day.
Can You Speed Up The Time It Takes For Weed To Leave Your Body?
Once you have consumed cannabis, the body takes time to break it down into metabolites. Despite what some believe, there’s not a whole lot a person can do to rush weed out of their system; exercising, drinking water, and eating healthy foods can help, but not in a drastic way. Drug tests can also detect when one is trying to dilute urine in a way that masks the metabolites.
You may see many detox kits or remedies sold on the internet that say they use herbal supplements such as creatinine or vitamin B-12 to mask any attempt at dilution. Whether or not these kits work is one thing, but a high level of THC in the system does not indicate impairment; most Canadians can enjoy their legal cannabis off-hours without worrying about work.
We should note that one thing doesn’t change: employees have never been able to come to work impaired, before and after the legalization of marijuana. Parole boards can also still add conditions to a release order that prohibits the consumption of weed.
Frequently Asked Questions About Weed Health & Risks
For most tests, weed is usually detectable in the body for up to a week in occasional users and up to 30 days after consumption if they use it chronically (once a day or more). The metabolites of THC can be detectable in hair for several months.
After the liver breaks down THC into fat-soluble metabolites, the metabolites can spread throughout the body. As such, weed can be tested through samples of urine, saliva, hair, and blood.
Related Weed Half-Life and Effects Resources
Learn More About Marijuana & Cannabis Culture
Read the latest Kushmapper
Learning Center Articles
Are you looking for the most recent articles on marijuana advances and weed culture phenomena? Browse our latest resources below and let us know if you have any questions. We’re here to support you as you embark on your road to becoming an expert!
Looking For Local Dispensaries?