How Long Does Marijuana Stay In Your System (And Why)?

How Long Does Marijuana Stay In Your System (And Why)?

Exact Answer: 7- 21 Days

Marijuana is also known as cannabis. It is a psychoactive drug and is obtained from cannabis plants. Tetrahydrocannabinol that is THC is the main psychoactive component of cannabis.

Marijuana is native to Central Asia and the Indian Subcontinent. THC is one of the 483 known compounds in the plant, including at least 65 other cannabinoids. Cannabis contains at least 120 active ingredients, or cannabinoids. Marijuana is a plant and people use the dried leaves, oilseeds, or fruits of the cannabis plant for recreational or medicinal purposes. Marijuana is used in many ways. Some of them are smoking, eating it raw, taking it as capsules or supplements, or brewing it as a tea, etc.

The marijuana plant has chemicals that may help in dealing with some health problems. Two medicines have been made from chemicals like THC. The first medicine can be used in the treatment of nausea and the other could make you feel hungry if you don’t feel like eating.

How Long Does Marijuana Stay In Your System

How Long Does Marijuana Stay In Your System?

Marijuana, also referred to as weeds, pot, or ganja is a psychoactive drug, which is mind alerting. It is most commonly used for smoking. However, it is illegal in many countries, including the United States, Algeria, Nigeria, etc.

When marijuana is smoked, its effects or action could be detected just after being smoked, which last for about one to three hours in our system. When marijuana is eaten in the form of an edible, its effects could be seen or felt after 30 minutes to one hour after it is consumed. It lasts for several hours in our body. For how long marijuana lasts in our system also varies from person to person.

For a person who takes marijuana daily via smoking, the cannabis may be detectable for a month or more after they consumed it for the last time. For a person who smokes marijuana moderately nearly three or four times a week, it may be detectable for five to seven days after last consumed.

For a person who consumes it often, it may last in our system for about three days. There are various tests to detect the presence of marijuana in our systems like urine tests, blood tests, saliva tests, and hair tests.

The following table represents the tests used to detect the presence of marijuana in our system and the period for how long it can be detected-

Urine Tests3-30 days after use
Blood Tests3-4 hours
Saliva Tests24 hours after use
Hair Tests90 days after use

Why Does Marijuana Stay In Our System For So Long?

Tetrahydrocannabinol is a chemical in marijuana that makes people feel high. For how long marijuana can stays in our system depends on different conditions like how much amount of it is consumed or which test is used to detect its presence or how the person smokes etc.

The THC chemical in marijuana is broken down rapidly and modified into molecules. These molecules are called metabolites. THC is capable of forming at least 80 different metabolites.

These metabolites are stored in our body fat and do not escape from our system fast. They are gradually eliminated from our bodies via urine or feces. This is because marijuana stays for so long in our bodies or system. The longest-reported detection period is more than ninety days.


Marijuana is legal in many countries whereas illegal in others. There are many places that are making its use legal due to its medicinal advantages. Though only because it is legal in some countries does not make it safe for intake.

A large amount of its use or excessive use of marijuana can cause damage to memory and attention. It can cause so because most of the THC’s effects happens in the brain. In the brain, chemical interacts with receptors on brain cells called cannabinoid receptors.

If marijuana is taken during pregnancy can cause harm to the baby. It can also cause health issues like anxiety, depression, and schizophrenia. Intake of marijuana in the form of smoking may also damage our lungs and cardiovascular system.


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