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The active ingredient in marijuana, THC, usually stays in your urine for 1-2 weeks. It can also be found in you blood for up to a month

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13y ago

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The effects of smoking marijuana typically last 1-3 hours, but traces of THC, the active ingredient in weed, can be detected in a urine test for up to 30 days, in blood for up to 2 days, and in saliva for up to 72 hours. Factors like frequency of use, metabolism, and body fat percentage can influence how long THC stays in your system.

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11mo ago
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Q: How long does weed stay in you?
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