How Long Does Cannabis Stay in Urine? Detection Windows, Cutoffs, and Home Testing
Cannabis in urine shows up for 1 to 3 days after one use and 15 to 30 days with daily use. Here is what changes the number and how to test yourself.
How Long Can THC Be Detected in Urine?
THC, or delta-9-tetrahydrocannabinol, is the primary psychoactive compound in cannabis. The detection period in urine can vary widely based on several factors. Typically, THC can be detected in urine for up to a month after consumption.
Factors Affecting Detection Duration
Amount of THC ingested
Frequency of cannabis use
Body mass and metabolism
Presence of other drugs
Types of Urine Tests
There are two types of urine tests that detect THC: the urine immunoassay (UIA) and the gas chromatography-mass spectrometry (GC-MS) test. The UIA is a preliminary test and can detect THC for a shorter period, typically up to a few days. The GC-MS is a more accurate and comprehensive test, which can detect THC even after a month.