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How Long Does Cannabis Stay in Your System?

Posted by

thesmokebomb

September 30, 2025

On September 30, 2025

Table of Contents

Cannabis can stay in your system from 1 day to over 30 days, depending on usage, metabolism, and testing method. Urine tests detect THC the longest, while saliva and blood clear faster. Learn detection times for urine, blood, saliva, and hair tests.

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Factors That Influence Detection Time

Frequency of Use: Occasional users may clear THC in days, while heavy users retain it for weeks
Metabolism: Faster metabolisms eliminate cannabinoids more quickly
Body Fat: THC is stored in fat cells, so higher body fat can prolong detection
Consumption Method: Edibles often linger longer than smoking or vaping

Detection Windows by Test Type

Test Type	Detection Time (Occasional Use)	Detection Time (Frequent Use)
Urine	3–7 days	30+ days
Blood	1–2 days	Up to 7 days
Saliva	24–48 hours	Up to 72 hours
Hair	Up to 90 days	Up to 90 days

Why Cannabis Lasts Longer Than Alcohol

Unlike alcohol, THC binds to fat cells and is released slowly over time. This is why even after the high wears off, tests may still detect cannabis.

Final Takeaway

Cannabis doesn’t leave everyone’s body at the same rate. Light users may clear it in days, but daily users can test positive for weeks or months, especially with urine and hair tests.

FAQs About How Long Cannabis Stays in Your Body

Can drinking water flush THC out faster?
No. Staying hydrated may slightly dilute urine but it doesn’t speed up THC elimination. Only time and metabolism truly reduce levels.

Which test is hardest to pass?
Hair tests are the hardest since they can detect cannabis use up to 90 days. Urine tests are most common and detect recent use.

Does exercise help get rid of THC?
Exercise may release THC stored in fat cells, but it doesn’t guarantee faster clearance. In some cases, it can temporarily raise detectable levels.

How long do edibles stay in your system?
Edibles can last longer than smoking since THC is processed by the liver. Traces may remain for 1–2 weeks in occasional users and longer in daily users.

Can secondhand smoke make you test positive?
Unlikely in normal settings, but prolonged exposure in unventilated spaces may result in trace detection in sensitive tests.