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Marijuana traces can be evident in urine upto a week after it was 'consumed'. The tests will only be able to work out when it was smoked insofar as a weaker sample would suggest it had some time to work it's way out of the system, but could simply suggest less was smoked or the subject has higher metabolism rate. Traces will be evident in blood samples for much longer, sometimes up to three weeks.

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No, a urine test can show whether marijuana has been used recently, but it cannot determine exactly when it was smoked. THC, the main psychoactive ingredient in marijuana, can be detected in urine for days to weeks after use depending on frequency of use and metabolism.

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Q: Can a urine test determine when marijuana was smoked?
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Does every urine test screen for marijuana?

No, not every urine test screens for marijuana. The specific substances tested for can vary depending on the purpose of the test and the requirements of the organization conducting it.


Is 4000 nanograms of marijuana in urine possible?

Yes, in fact my best friend had 4450 nanograms. It took months of habitual use and then the week he was arrested him and his three buddies smoked an entire ounce ($240!) but it is very possible to test that.


You smoke bout three times a day but you havent smoked for 74 days are you good on a urine test?

If you haven't smoked for 74 days, it's likely that THC has cleared from your system and you would likely pass a urine test. However, individual metabolism and other factors can affect how long THC stays in your system, so it's not guaranteed. Consider taking an at-home drug test to confirm before a formal screening.


When taking a semen analysis test can they tell if you smoke marijuana?

A semen analysis test typically assesses parameters like sperm count, motility, and morphology. It does not specifically test for marijuana use. To detect marijuana in the body, a separate urine or blood test would be needed.


Will a urine test for marijuana show positive 3 months after marijuana usage?

In most cases, marijuana can be detected in urine tests for up to 30 days after last use, but it is unlikely to show positive after 3 months. The detection time can vary depending on factors like frequency of use, metabolism, and body fat percentage.