How Long Does Cannabis Stay in Your Hair?
Cannabis can be detected in hair for up to 90 days after the last use. This detection period is due to the hair's slow growth rate, which allows THC to remain trapped within the hair shaft.
Understanding THC Detection in Hair
The detection of THC in hair is based on the hair's growth cycle. THC and its metabolites can be incorporated into the hair shaft during the active growth phase, which typically lasts for about 1.5 to 3 months.
Factors Affecting Detection
- Frequency of Use: Regular users may have detectable THC in their hair for longer periods.
- Amount of THC: Higher doses of cannabis can lead to longer detection times.
- Hair Length: Longer hair can retain THC for a longer duration.
Conclusion
Understanding how long cannabis stays in your hair is important for individuals who may be subject to drug testing. Regular users should be aware that THC can be detected for up to 90 days post-last use.