Weed (marijuana) can stay in your system for varying lengths of time depending on factors like frequency of use, metabolism, body fat, and type of drug test. Here are typical detection windows:
- Blood test: Up to about 12 hours to a few days for heavy users.
- Saliva test: Up to 24-34 hours.
- Urine test: Up to 3 days for one-time use, 5-15 days for regular use, and 30 days or more for heavy or daily use.
- Hair test: Up to 90 days or longer.
THC, the active compound, is stored in fat tissues and metabolized slowly, especially with frequent or heavy use, which prolongs detectability in urine and hair samples. For occasional users, THC may clear in a few days; for heavy users, it could take several weeks or more to fully clear from the system.
