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According to the website of Columbia University's Health Services:

Marijuana itself does not "stay" in your system, but the main chemical in marijuana, THC, does. It fact, it may stay in your system forever because it is stored in fatty tissues of various organs.

Despite being stored in body fat, THC is onlydetectable for a certain amount of time. Many drug tests, including urine tests, look for 9-carboxy-THC which is the by-product of your body metabolizing the THC in your fat.

Marijuana Detection TimesFrequent users blood drug test (defined as someone who smokes several times per week)

THC: 4-8 hours after smoking

THC by-product: 2 or more weeks after smoking

Frequent users urine drug test

THC by-product: 2 weeks to a month after smoking (3 months for extremely heavy users)

Infrequent users blood drug test

THC: 3-4 hours after smoking

THC by-product: 2-3 days after smoking

Infrequent users urine drug test

THC by-product: up to 10 days after smoking

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13y ago
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12y ago

A couple hours or minutes depending how much the person has took. But around 30 minutes to 3-4 hours.

Thats how long you are "stoned" for......marijuana can take up to 28 days to fully exit your system(not show up on a standard drug test) but you can clense your system in a matter of 4 days to a week or two. it just depends on the individual persons ,wieght ,metabolism, and how much was smoked. but 28 days to be sure!

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13y ago

first time smokers probably around a week or two, up to a month depending on the amount smoked.

heavy smokers, say you smoke a lot everyday, up to 3 months.

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14y ago

This varies greatly. If I was gonna make an (un)educated guess I'd say anywhere from 14 days till 2-3 months.

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Q: How long does marijuana last in the body?
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