Table of Contents
How long marijuana stay in system
1. Key Influencing Factors
Several variables affect how long marijuana remains detectable:
- Frequency of Use: More frequent use leads to longer retention.
- Dosage and Potency: Higher THC content extends presence.
- Metabolism: Faster metabolism shortens detection time.
- Body Fat: THC is fat-soluble, so higher fat percentage extends storage.
- Hydration and Activity Level: Minor influence on metabolite elimination.
2. Detection by Test Type
Urine Test (Most Common)
- Single Use: 1–3 days
- Moderate Use (4–5 times/week): 5–7 days
- Daily Use: 10–15 days
- Chronic Heavy Use: 30+ days
Blood Test
- Occasional Use: Up to 24 hours
- Chronic Use: Up to 7 days
- Note: Best for detecting current impairment.
Saliva Test
- Single Use: 24–72 hours
- Frequent Use: Up to 1 week
Hair Test
- All Use Levels: Up to 90 days
- Note: Reflects long-term exposure, not recent use.
3. Summary
While the psychoactive effects of THC wear off in a few hours, its metabolites—particularly THC-COOH—can remain detectable for days to weeks. The timeline varies widely depending on individual biology and usage patterns.
