How long does weed last in your system?

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Weed will stay in an occasional smoker's system for up to 10 days, a regular smoker up to 45 days and a heavy smoker up to 90 days. It is stored in the fat cells of the body. ChaCha!

Answered - 5 days ago at 6:00pm on May 27 2012

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Some say that THC never leaves your brain. Also there are several different factors affecting whether or not you test positive.

Answered by Kimberlee B. - 1163 days ago at 1:59pm on Mar 26 2009

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Generally, traces of THC can be detected days after a smoking session. In heavy users, traces can be detected for several weeks.

Answered by Amy G. - 1165 days ago at 9:42am on Mar 24 2009