Urine smells like weed because of the metabolites in marijuana. Weed contains more than 100 cannabinoid compounds that can be detected in the urine.

The most common one is THC (short for tetrahydrocannabinol), which is the active ingredient in marijuana. It doesn’t take much of it to show up on a drug test, either. A single puff of pot can be detected in your urine for up to 48 hours after use, and a single joint can contain enough THC to cause a positive result on a drug test for up to 72 hours after smoking.

The longer you wait before taking the test, the better your chances are of passing it cleanly.

The reason cannabis is so hard to pin down is because it’s actually made up of several different chemicals that have similar molecular structures and therefore have similar effects on the body. Some only affect our brains while others affect our bodies as well; some only last a few minutes while others last days; some are psychoactive while others aren’t — and some don’t even make us high!

So how do we know which ones will show up on a drug test? Well, there’s no way around it: We need to know what we’re looking for before we can determine whether or not it.

Last modified: October 11, 2022