How long can marijuana be detected in your system after the last use?

The detection window for marijuana in a person's system can vary based on several factors, including the frequency of use, the individual's metabolism, body fat, and the type of drug test being administered. For occasional users, marijuana may be detectable for several days to a few weeks. However, for regular or heavy users, THC metabolites can accumulate in body fat and be released over time, leading to detection in urine tests for a month or longer after the last use.

The option stating that marijuana can be detected for a month or longer accurately reflects the possibility for heavy users or those with slower metabolisms. In fact, in some cases, especially with chronic use, traces can remain even longer, making this option the most comprehensive among the choices given.

In contrast, the other options tend to underestimate the potential duration marijuana can remain detectable in the system, especially for those who use it with greater frequency or higher amounts. Therefore, understanding the metabolic processes and the persistence of THC is crucial for interpreting drug test results accurately.