How Long Does Marijuana Stay in Your System (Urine, Blood, Saliva & Hair)

Marijuana, a.k.a. weed, can be detectable in bodily fluids for one to thirty days after last use. Marijuana detection windows depend on how much you smoke or ingest and how often you do the drug. Higher doses and more frequent uses tend to have longer detection times. For users you use cannabis daily it can be detectable for several months after last use and the longest reported times are more than ninety days.

Finding marijuana in your system depends on the method that the tester chooses. Here are the variety of methods to tell how long weed last in your system.

1. Urine Testing

The Mayo Clinic Proceedings says that weed is detectable in urine depending on how often the user uses the drug. Occasional users which use up to three times a week can last for three days, while moderate users who smoke four times a week can last five to seven days. Chronic users who smoke daily can last ten to fifteen days and chronic heavy users who smoke multiple times a day can have weed in their system for more than thirty days. Weed is known to bind to fat molecules in your body, causing it to take some time to leave your system. Urine testing is also the most common testing method.

2. Blood Testing

According to the Therapeutic Drug Monitoring, marijuana can be detectable in the blood for one to two days. In some cases it has been detected after twenty-five days and chronic heavy use increases the length of time that it can be detected. Blood testing can detect weed in the bloodstream within seconds of inhalation since it is distributed to the tissues in your body. Some of the drug is reabsorbed in the blood and broken down and it metabolites may remain in the bloodstream for days.

3. Saliva Testing

For occasional users weed can be detected in the saliva for one to three days after first use. For chronic users weed can be found one to twenty-nine days after first use and it can enter the saliva through smoking or exposure to smoke. Weed metabolites are only present in the saliva when it has been smoke or ingested. Typically this type of test is down for roadside testing or in certain jurisdictions where marijuana is legal.

4. Hair Testing

A hair test can assess drug use for up to ninety days. After a user uses marijuana it reaches the hair follicles via a small blood vessel and trace amounts may remain in the hair. Hair typically grows 0.5 inches a month, a 1.5-inch segment taken close to the scalp can give a window of marijuana use for the past three months.

There are other factors like your age, gender, and body mass index that aren’t related to the drug at all that can factor how long it stays in your body since everyone’s body processes and metabolizes the drug differently. Other factors include how you use the drug and how often you use it. Higher doses and a more frequent use tends to increase the amount of time it takes for the drug to leave your system.

Weed that is also more potent or containing a higher THC count, can also stay in your system a bit longer. If you ingest your weed in an editable it may also stick in your body slightly longer then if you decided to smoke it.

There isn’t anything a person can do to speed up the amount of time it takes for weed to leave the system. Your body needs time to break it down once it enters our system and while exercising, eating healthy, and staying hydrated may help the process it doesn’t do so drastically. There are a number of kits you can buy online that say they help kick the drug from your system faster but they aren’t reliable.

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