Here's what we know about marijuana in the system. Urine ... affect how long THC stays in the system? As noted, the frequency and amount affect how long THC and its metabolites stay in the system.

But how long do these ... system. Marijuana affects men and women differently, and the type of drug test can also make a ...

Drugs like marijuana, cocaine, and MDMA can remain in your system for days, weeks, and even months. But they vary drastically in how long they can be detected in your urine, blood, and hair.