How Long Does Marijuana Stay in System | Pop's Cannabis

Wondering how long marijuana stays in your system? The honest answer is that it depends on how often you use, how potent the product is, and which test is being used. Someone who tries cannabis once may clear THC in a few days, while a daily, high-potency consumer can still test positive a month or more later. Here is a plain-English breakdown of the common detection windows and the factors that stretch them shorter or longer.

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Key Features

• Urine: roughly 3 days after occasional use, and up to 30 days for heavy daily users.
• Blood: usually 1 to 2 days, occasionally up to 36 hours after the last session.
• Saliva (oral fluid): about 24 to 48 hours, sometimes up to 3 days.
• Hair: up to 90 days, because THC metabolites stay locked in the follicle as it grows.
• Frequency is the biggest variable: daily use stores far more THC than weekend use.
• Body fat and metabolism: THC is fat-soluble, so lean, fast-metabolizing people tend to clear it sooner.
• Potency and method: concentrates, vapes, and edibles can lengthen the window compared with a small amount of flower.
• Hydration and movement: water and regular exercise support the natural clearance your liver and kidneys already do.

How Testing Methods and Detection Windows Work

Most screens do not look for THC itself. They look for THC-COOH, the metabolite your liver produces after you consume cannabis, and that metabolite is what lingers in urine and hair. Standard workplace urine screens use a 50 ng/mL immunoassay cutoff, with a more precise 15 ng/mL confirmation test if a sample comes back positive. Blood tests capture delta-9 THC while it is still circulating, which is why their window is short, while hair tests measure accumulation over months. Nothing on this list is a guarantee — your own numbers depend on tolerance, dose, and how much fat tissue you carry.

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Does CBD show up on a drug test?

Full-spectrum CBD can carry trace amounts of THC, so very heavy use may register on a screen. CBD isolate with no detectable THC is far less likely to cause a positive result.

Can you flush THC out of your system quickly?

No method clears THC overnight. Extra water, rest, and exercise only support what your body already does, and detox drinks mostly dilute a sample, which labs flag as a diluted negative.

Will exercise speed up detox?

Aerobic activity burns the fat stores where THC metabolites sit, which may help slightly over several weeks. It will not change a test you take tomorrow.