Weed (marijuana) can stay in the system for varying lengths of time depending on factors such as the frequency of use, metabolism, body fat, and the type of drug test used. Generally:
- For occasional or one-time use, weed may be detectable in the system for around 4 to 15 days.
- For regular or heavy use, traces can remain for 20 to 65 days, and sometimes even up to 90 days in hair tests.
- Detection windows by test type:
- Blood: up to about 12 hours to a few days
- Saliva: 24 to 48 hours
- Urine: up to 30 days or more for heavy users
- Hair: up to 90 days (3 months)
The active ingredient THC binds to fat cells, which is why it stays longer in the body, especially for those with higher body fat or slower metabolism. The amount consumed and how often cannabis is used are key factors affecting detection time. In summary, weed can stay in the system anywhere from a few days to several weeks or months depending on use patterns and testing methods.
