How Long Does THC Stay in Your System?
How Long Does THC Stay in Your System?
The privacy question behind countless searches: detection windows vary wildly by test type and usage pattern.
Detection windows by test
- Urine: 2-7 days (single use), 2-4 weeks (regular use), 6+ weeks (chronic heavy use)
- Blood: 6-24 hours for active THC, longer for metabolites
- Saliva: 24-72 hours typically
- Hair: up to 90 days
What changes your window
- Frequency and dose of use
- Body fat percentage and metabolism
- Hydration and exercise (short-term shifts only)
Quick answers
Does second-hand vapour show up on tests?
Realistic passive exposure stays far below typical cutoffs.
Do CBD products risk a positive?
Full-spectrum CBD can accumulate enough THC to flag sensitive tests; isolates do not.
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This article is for informational purposes only, for adults (18+). Cannabis laws differ by country – always follow the rules where you are and use responsibly.
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Adults 18+ only. This article is general information, not medical advice. Our products are not intended to diagnose, treat, cure or prevent any disease. If you have a health condition, are pregnant or breastfeeding, or take medication, speak to a qualified healthcare professional before using any cannabinoid product.
