How long does marijuana stay in your body?

2.2.1.1 Smoked cannabis

The estimation of dose administered by the smoking route is a major variable in the assessment of absorption of cannabinoids (mainly THC) in humans. The source of the plant material and the composition of the cigarette, together with the efficiency of smoking by the subject, are additional uncontrolled factors. It might be reasonable to consider about 10% (range 3–30%) as an average for THC content in Canadian marihuana. It appears that habitual (heavy) marihuana smokers can increase the amount absorbed, which is attributed to more efficient smoking techniques (Agurell, et al., 1986).

THC absorption by inhalation is extremely rapid, with a bioavailability of 18 to 50% from the cigarette (Huestis, 1999), and is the main reason this route is preferred by many people (Iverson, 2000, p 46–47).

Standardised cigarettes have been developed by NIDA, and the relationships among cannabis (THC) content, dose administered and resultant plasma levels have been investigated. Smoking cannabis containing 1.64% THC (mean dose 13.0 mg THC) resulted in mean peak THC plasma levels of 77 ng/mL (Ohlsson, et al., 1980).

THC levels in plasma decreased rapidly after cessation of smoking and were below 5 ng/mL, 2 hours after smoking; mean concentrations declined by about 50%, 15 minutes after (Huestis, et al., 1992) reaching the maximum (Huestis, 1999) . However, THC from a single dose can be detected in plasma for at least a day using modern sensitive analytical techniques and for 13 days in chronic users (Johansson, et al., 1988). The decline of THC in plasma is multiphasic and as Harvey (Harvey, 1999) notes, the estimates of the terminal half-life of THC in humans have increased as analytical methods have become more sensitive. There is still no consensus. It is probably safe to say that the terminal half-life of THC averages at least a week and could be considerably longer. The half-life in plasma does not appear to be different between heavy and light users (Agurell, et al., 1971).

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First, you ask “Is it a sin to smoke weed”. Now you ask how long it stays in your body. Don’t even think about doing that, kid! It’s illegal. You will have to face the consequences.

If you are serious about sports, medical school and being a surgeon, I’d suggest you get a new hobby.

@syz: again with not answering the question, thanks for the tip though(literally)

Hey, you ask four questions in a row about pot, it’s the risk you take.

any advice??????

how long does it stay in your body?

THC is stored in fat cells. It can stay there a long time. If you lose weight in the future, that could free the THC that was in that fat and make you score positive in the future. Who knows when?

http://adcaps.wsu.edu/default.asp?PageID=224

This link gives some information about the “half-life” of THC in the system. Half-life means that after so many days, half of it is gone. Then after that many days again, half of what remains is gone. And then half of that. Sounds like it could take a while, eh?

30 days, unless you drink a considerable amount of water daily, then you can shorten the
30 days time cycle